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WorksheetsScience Final Study Guide
Total questions: 114
Worksheet time: 57mins
Acceleration is directly proportional to
Mass
Force
None
A textbook is sliding across a table. The Force = 5N. A stack of 3 textbooks will require a force of at least ___ to slide F=ma
5N
10N
15N
Mass and acceleration are inversely proportional to one another. This means that as mass increases the acceleration ___ if the force stays the same.
Decreases
Increases
Stays the Same
A net force pushes on a 6kg cart and accelerates it at 5 m/s2. The SAME force is now pushing on a 3 kg cart. The acceleration of the 3 kg cart is... F=ma
Half as much
The same as
Twice as much
It is not possible to tell
If you push a 10 kg box across a tile floor with a force of 200 N, at CONSTANT (same) velocity, a=
20 m/s2
2 m/s2
0 m/s2
A kilogram is a measure of an object's
Weight
Force
Mass
Size
Why does a linebacker attempt to get his body under his opponent and push upward?
To increase lift
To decrease friction
To increase friction
To absolutely destroy the opponent
To move mass of a 5kg cannonball with an acceleration of 4 m/s2, the force must be...
9N
20N
0.8M
The newton is a unit of
Force
Mass
Density
Inertia
Strange as it may seem, it is just as hard to accelerate a car on level surface on the moon as it is here on the Earth. This is because...
The mass of the car is independent of gravity
The weight of th car is independent of gravity
Nonsense! A car is much more easily accelerated on the moon than on the Earth
A forice is a vector quantity because it has both
mass and acceleration
magnitude and direction
action and reaction counterparts
An object is propelled along a straight-line path by a force. If the net force were doubled, the object's acceleration would be
Half as much
Twice as much
The same
Four times as much
None of these
Which has zero acceleration? An object
All of these
None of these
At rest
Moving at constant velocity
In mechanical equilibrium
The force of friction on a sliding object is 10 N. The applied force needed to maintain a constant velocity is
10N
More than 10N
Less then 10N
A 10N falling object encounters 4N of air resistance. The net force on the object is
0N
4N
6N
10N
None of these
An object is pulled northwards by a force of 10N and at a same time another force of 15N pulls it southward. The magnitude of the resultant force on the object is
0N
5N
25N
150N
Whenever the net force on an object is zero, its acceleration
May be less than zero
Is zero
May be more than zero
A tow truck exerts a force of 3000N on a car, accelerating it at 2 meters per second per second. What is the mass of the car?
500kg
1000kg
1500kg
3000kg
None of these
A car has a mass of 1000 kg and accelerate at 2 meters per second. What is the magnitude of the net force exerted on the car?
500N
1000N
1500N
2000N
None of these
A girl pulls on a 10kg wagon with a constant horizontal force of 30N. If there are no other horizontal forces, what is the wagon's acceleration in meters per second per second?
0.3
3
10
30
300
The human body can, under certain conditions, withstand an acceleration of 10g. What net force would produce this acceleration of a 50kg person?
About 500N
About 2500N
About 5000N
About 25000
A piece of paper and a crumpled piece of paper fall from a desk at the same time. The amount of air-resistance force is
Greater on the crumples paper
Greater on the uncrumpled paper
The same on each
An action force can exist without a reaction force
True
False
Your weight is
A property of mechanical equilibirum
Equal to your mass
The gravitational attraction force between you and the Earth
Newton's 3rd law says that for every force there is an equal and opposite force
True
False
A baseball hits a ball with 55N of force
The ball hits the bat with 55N in the opposite direction - reaction force
The ball hits the bat with 55N in the same direction - action force
The ball does not hit the bat
A little kid is playing T-ball and hits the ball with 35N of force. The ball exerts
35N force on the bat
0N force on the bat - that's why it moves
Less than 35N of force on the bat
More than 35N of force on the bat
When you walk along a slippery floor and can't go forwards, what is PREVENTING you from moving?
The floor puching back on you
You pushing on the floor
A cannon shoots a cannonball. Which of these is TRUE
1 & 2
4) The forces are the same so the acceleration is the same
1) The cannon has a lower acceleration b/c it has more mass
2) the cannonball has a higher acceleration b/c it has less mass
3) the forces are different
The gravity of the earth pulls you down into your soft comfy bed. What is the reaction force?
You pull down on the Earth
You pull up on the Earth
You blow up a balloon and hold the opening tightly shut. Then you let go. The balloon shoots up because
None
The balloon pushes the gasses
The gasses push the balloon
You are shooting a heavy hunting rifle. Carefully you tuck the stock into your shoulder, tighten your muscles, gently pull the trigger and fire. You feel the force of the gunpowder explosion as a strong push against your shoulder. Because you took a stable wide stance you rock a little, but don't fall down. The bullet leaves the barrel with a much greater acceleration because it has such a small mass
False
True
A cannon shoots a cannonball. The force on the cannon is ___ compared to the force on the cannon ball
The same
Greater
Less
A heavy drone is inside a truck. It carries a payload of 50N. The truck is sitting on a weighing scale. You operate the controls so that the drone is hovering INSIDE the truck. Because the drone is hovering
The truck will weigh the same b/c the drone is punching down in the air
The truck will weigh the same no matter what
The truck will weigh less b/c the drone is in the air
You hold your arm and hand out the window of a car going down the highway, pretending it is an airplane wing. You tilt your hand just a little and the hand starts tot rise. If you tilt your hands too much, your whole arm bounces up. Which of the following is correct?
1) The tilts hand diverts air down
2) When air is pushed down, it pushes back, lifting the hand
3) This is an example of Newton's 3rd law
1 & 2 only
1, 2, 3
In the horse and cart problem inside the system of the horse and cart, the force of the horse pulling on the cart = force of the cart on the horse & so nothing should move. But the horse and cart do move b/c of an external force (one that is outside the system)
The ground pushes on the horse's hoofs
The horse hoofs push on the ground
2 players go for the soccer ball. When does the ball NOT move?
Kicks are side by side
Kicks are equal and opposite
kicks are behind one another
You are supposed to be wieghing yourself in the bathroom. The scale is close to the sink and you push DOWN on the sink. Which of these is FALSE?
The sink pushes down on you
the scale reads less
you puch down on the sink
the sink pushes up
You are in a long war canoe. Lots of paddlers! It's empty and you want to walk to the front to get out. Unfortunately all your friends have left and so you start walking to the front, assuming you are going to get closer to the beach. But as you walk forwards, the canoe moves backwards, and so you are no closer to thee shore. What could be done to get you to shore?
freeze the water so that the canoe can't move & there is a reaction force that pushes you forwards (Be like Elsa!!)
Have a buddy hold a rope tied to the front of the canoe so that the reaction force of you walking is transmitted to the boat/rope and you move forwards
both of these could work (especially if you have Elsa powers)
Your little cousin is in a wagon. You tied the dog by its harness to the handle. Trying out a dog sled idea from YouTube. You notice that at first nothing is moving (there is a big sack of dog food in the wagon too). Then you hold a treat in front of the dogs nose, and the dog lunges forward pulling your cousin. Which is correct?
Inside the wagon - dog system the forces cancel out and there is no net force and so no motion
the dog lunging starts the wagon moving b/c the force of friction between the dog's feet and the ground is external to the system and there is an external force
for every action there is an equal and opposite eaction
a net force causes accleration
all are true
When you get up off the floor, your feet push up with a force ___ your weight?
greater than
less than
neither
When yuo are riding up a hill, you get up and start to pull up on the handlebars as you pedal. Which of these is FALSE?
the handlebars push down on you with the same force
the force is transmitted to the pedals making it easier to go up the hill
the friction on the road is more b/c you are standing up
There are 2 balls. The red one has a mass of 5kg and is moving 2 m/s. The Blue one has a mass of 10kg and is moving at 2 m/s. The ball with the most momentum is ___ and it has a momentum that is more because of ___
blue, velocity
red, velocity
blue, mass
red, mass
What is the momentum of a 15 kg ball rolling at 2 m/s?
30
7.5
Neither
Two cars are going down the road. They have the same mass. The green car changed from 10 m/s to 20 m/s. The black car goes from 0 m/s to 10 m/s. Which has the greater magnitude of the impulse causing the change?
Green
Black
Neither
Both
The function of the air bag is to
Extend the time of the impulse
Act as a barrier between the face and the steering wheel
Both
Neither
Rick pushes 2 crates across a slick floor. This takes 3s. Crate A is 30 kg and he pushes with 100N. Crate B is 20kg and is pushed with 75N. Which will have the GREATEST velocity? Hint: this is a 2 part question: solve F x t = Impulse and then use THAT to solve for velocity
A
B
Neither
A 500kg smartcar is driving at 10 m/s. it hits a guardrail that bends and takes 2s to come to a stop. What is the overall force? Hint: this is a 2 part problem. Solve for momentum and then set that equal to Impulse = F x t
5000N
2500N
10,000N
ou are boxing. You can choose the type of glove your opponent uses. Should they use 6oz or 16oz gloves (the ounces tell how much padding the gloves have). Which will hurt less if you re hit? Why?
16ox b/c more mass
6oz b/c less mass
16oz b/c longer time
6oz b/c longer time
A basketball is pumped up tight. A golf ball is stacked on top of a basketball. The stack is dropped. Which of these is TRUE
1) the basketball has higher mass and less velocity
2) the golf ball has lower mass and higher velocity
3) the momentum of each if the same so they are equal to each other
1 & 2
All a true
The difference between mass and momentum is that momentum has MOTION
True
False
Karate girl is trying to break a board. As she hits she "bounces" her hand. This will transfer ___ momentum and break the board more easily.
More
Less
Same
A 1 kg egg is thrown at a sheet hanging from a clothes line at 2 m/s. It takes 0.2s for the egg to come to a stop. A force of 12N will cause the egg to break. Did the egg break?
Yes
No
Erica is standing on a skateboard. She has a medicine ball that has a mass of 10kg. She acts like she is throwing it but doesn't let go. She will
roll slowly
not roll
roll quickly
Cassie is catching a super-fast hard ball with he bare hands. She does it and wow no pain! She must have...
moved into the impact decreasing the time of the impulse
"rolled" back with the impact increasing the time of the impulse
NOT possible
A semi-truck and a motocycle are both driving 55 km/h. Which has MORE momentum?
Truck
Motorcycle
Same
A force is a puch or pull. This is different from an impulse because ___ matters in calculating impulse
Mass
Time
Neither
If you push for half an hour or a whole hour against a stationary wall...
half as much work is done during the half hour
twice as much work is done during the half hour
it is impossible to dtermine how much work is done here
no work is done on the wall in either case
At the point that is the highest (top right hand corner) the cars have the __ PE. As the cars move down to the left to the lowest point pf the ride, the KE is the __. Rolling up to the left to the next hill (halfway of highest point) KE is __ compared to PE.
Most, Most, Equal to
Least, Most, Equal to
Most, Least Equal to
Least, Least, Equal to
Most, Most, More than
In a car crash, the front end of a modern car crumples over a period of time of about 4 seconds. The impact with an older "stiifer" car takes only 1 second. This means that the modern car experiences ___ amount of force.
4 times
1 time
1/4 time
can't tell
If a golf ball is raised to 2m, compared to being at 1m, the PE will be
half as much
twice as much
four times as much
impossible to tell from this info
You are running stairs with your classmate. She runs that stairs in 45 seconds. You run them in 35 seconds. That means you have more ___
Energy
Power
Effort
Work
A coconut in a palm tree has the most potential energy
just before it hits the ground
attached just under the palm fronds high in the tree
halfway to the ground as it is falling
When an automobile is braked to a stop, its KE is transformed to
Stopping energy
PE
enrgy of motion
energy of rest
heat
A golf ball and a wiffle ball are both dropped from 2m height. The __ ball with have more PE at the top and therefore more KE at the bottom because
golf ; it has more mass
wiffle ; it has more mass
golf ; it has less mass
wiffle ; it has less mass
A 1000kg and a 2000kg care are hoisted the same distance. Raising the more massive car requires
less work
twice as much work
four times as much work
more than four times as much work
An object may have PE because of its
speed
acceleration
momentum
location
none of these
A car moves 4 times as fast as another identical car. Compared to the slower car, the faster car has
4 times the KE
8 times the KE
12 times the KE
16 times the KE
A car travels twice as fast as another when braking to a stop will skid
twice as far
four times as far
depends on the mass of the cars
Strictly speaking, more fuel is consumed by your car if an air conditioner, headlights, or even radio is turned on. The statement is
true
totally false
true only if the car's engine is running fast
true only if the car's engine is running slow
If Nellie Newton shakes a bell causing it to ring, she transfers which type of energy?
electrical to heat
radiant to mechanical
mechanical to sound
sound to chemical
Which requires more work: lifting a 70kg sack vertically 2 meters or lifting a 36kg sack vertically 4 meters?
lifting the 70kg sack
lifting the 35kg sack
both require same amt of work
An arrow in a bow has 70J of PE. Assuming no loss of energy to heat, how much KE will it have after it has been shot
0J
35J
50J
70J
140J
A ball rolling down an incline has its maximum speed
halfway down the incline
near the top of the incline
at the end of the incline
impossible to predict w/o knowing the ball's mass and/or size
If you push on an object a given distance while applying twice the force, you do
twice as much work
four times as much work
the same amt of work
half as much work
If an object is raised twice as high, its PE will be
half as much
tiwice as much
four times as much
impossible to determine unless time is given
A clerk can lift containers a vertical distance of 1m or can roll them up a 2m long ramp to the same elevation. With the ramp, the applied force required is about
half as much
twice as much
the same
four times as much
A car moves 4 times as fast as another identical car. Compared to the slower car, the faster car has
4x the KE
8x the KE
12x the KE
16x the KE
A 2kg mass is held 4m above the ground. What is the approximate PE of the mass with respect to the ground?
6J
8J
32J
80J
If one load is lifted up two stories, how much work is done compared to lifting one load up only one story?
one quarter as much
one half as much
the same amt
twice as much
four times as much
A TV set is pushed a distance of 2m with a force of 20N. How much work is done on the set?
2J
10J
20J
40J
800J
A woman carries a heavy box across a room at a constant speed. Thus there is no net force. How much work is does she do on the box while walking?
None
More info needed about the weight of the box
More info is needed about the speed and distance
more info is needed about the weight, distance, and her speed
The total energy of all the particles in a substance is called ___
temperature
thermal energy
degrees
mass
The transfer of energy by electromagnetic waves is called __
conduction
convection
radiation
insulation
The movement of thermal energy from a warmer object to a cooler object is called ___
heat
temperature
motion
momentum
Heat, like work, is an energy transfer measured in __
watts
degrees
joules
kelvins
Heat is transferred from one particle of matter to another without the movement of matter itself in a process called __
conduction
convection
radiation
insulation
Heat transfer occurs __
in many directions
both from warm objects to colder ones and from cold objects to warmer ones
only from warm objects to cold objects
only from cold objects to warmer ones
Which of these substances has the highest specific heat?
aluminum
glass
sand
water
A material that does NOT conduct heat well is called a (an) __
insulator
conductor
metal
radiator
What color star burns typically has the highest temperature?
orange
red
white
blue
How many different forms, or states, does most matter on Earth exist in?
one
two
three
fifty
The expanding of matter when it's heated is known as __
condensation
evaporation
thermal expansion
vaporization
The temperature at which a solid changes into a liquid (as heat is added) is
called __
the boiling point
the freezing point
the melting point
absolute zero
Which of the following are examples of the greenhouse effect?
the warming of a planet's surface due to the trapping of radiation by the planet's atmosphere
an automobile sitting in the bright sun on a hot day w/ its windows rolled up
both a and b
neither a or b
Water freezes at 32 degrees on which temperature scale?
Farenheit
Celsius
Kelvin
Absolute zero
What happens to KE, tempterature (in K), and velocity of water at absolute zero?
KE, T, and V all increase
KE, T, and V all decrease
KE, T, and V all equal 0
KE and T increase; velocity decreases
Which of these is a good conductor?
wood
paper
silver
air
For what purpose is this type of window used?
light entering the living space
insulation against heat from outside
insulation from cold and heat loss inside
all of the above
none of the above
A measure of the average KE of the individual particles in an object is called __
thermal energy
conduction
convection
temperature
What physical process is reduced by the device shown?
conduction
convection
radiation
all
none
A bimetallic strip will bend when heated because
metal band when heated
each metal expands at different rates
each side of the strip is at different temperature
etals contract when heated
When an iron ball is heated it becomes
neither
both
larger
smaller
What purpose do you think the air space serves?
increase conduction
decrease conduction
allows for conduction
blocks radiant heat
any older windows have only a single pane. Why do these windows not insulate very well?
conudction throught the window
convection as air inside and outside passes over the surface
radiation as heat radiats through the glass
all of these
Suppose the material is being heated (thermal energy is added). What change of state is represented by line segment B?
melting
freezing
boiling
condensing
What states of matter of a pure substance are represented in the graph?
solid
liquid
gas
all of these
none of these
What happenes to each of the variables - temperature and thermal energy - during the changes indicated by line segments A?
the water is changing from ice into water as heat is added
the thermal energy is added which makes the solid break up into liquid so the particles can move
the temperature will remain constant until all the ice has melted
a & b only
a, b, & c are all correct
You stand on a skateboard and throw a heavy ball to the RIGHT really hard. What will happen to you?
You go back
You go forward
You stay
That's not physically possible
What willl happen to you if you throw a really heavy ball, but do NOT let go. What will happen to you?
You go forward
You go back
You stay
Not physically possible
Assume this graph is for water. The temperature for line segment A is
0oC
273 K
32oF
a & c only
all are correct
When a solid turns into liquid, the temperature does not change. Why?
(a)
What's the difference between Exothermic and Endothermic?
Exothermic = exit
Endothermic = enter
Exoskeleton & Enderman
Exothermic is heat leaving
Endothermic is heat entering
When 2 objects strike, energy is __ ?
transferred
stay where they are
