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WorksheetsPRETEST Force & Motion
Total questions: 69
Worksheet time: 2hrs 18mins
What is a force?
the PUSH or PULL on an object
The MOTION an object creates
The objects HITTING one another
Going REALLY FAST
What is the unit for FORCE?
N (Newtons)
lbs (pounds)
g (grams)
m/s (meters per second)
If the net force is 0 the object will ...
CHANGE its motion
STAY the SAME, NOT Move
Match the description to the graph:
"The car is stopped."
A bicycle rode 210 meters in 3 minutes. What was the speed of the bicycle?
630 m/min
70 m/min
7 m/min
7,000 m/min
Match the description to the graph:
"The car is traveling at a constant speed."
Segment A-B The bus is _________________.
at rest
returning (to original position)
moving forward
What is the equation to calculate distance?
distance = speed/time
distance = time/speed
distance = speed/distance
distance = speed x time
If the man and the ball travels 90 m in 9 seconds, what is their average speed?
10 m/s
180 m/s
99 m/s
10 meters
If a lizard can run 8 m across the water in 4 seconds, how fast is he traveling?
32 m/s
2 m/s
2 seconds
34 meters
What is the net force on the car?
400 N forward (left)
0 N (balanced forces)
200 N forward (left)
200 N backward (right)
A force that opposes motion is
friction
inertia
acceleration
momentum
The planet Jupiter has much more mass than Earth. What is the weight of an astronaut who lands on Jupiter?
The astronaut would weigh more on Jupiter than on Earth
The astronaut would weigh somewhat less on Jupiter than on Earth
The astronaut would have the same weight on Jupiter as on Earth
The astronaut would be weightless on Jupiter
The gravity between two objects depends on the distance and ____________.
magnetic attraction
volume
mass
momentum
What is the acceleration of an object that takes 20 seconds to change from a speed of 200 meters/second to 300 meters/second?
5 m/s squared
5 m/s
100 m/s
100 m/s squared
The force that keeps satellites in orbit around Earth is
magnetic
friction
electrical
gravity
Person on the left = 45 N
Person on the right = 32 N
What is the net force?
zero N
10 N
77 N
13 N
When an object is sitting on the Earth, what do you call the force of gravity that is acting on the object?
weight
mass
magnetism
momentum
Which tells the VELOCITY of an object?
75 mph
75 mph south
Which scientist gave us the laws of motion?
George Washington
John Adams
Sir Isaac Newton
Which statement is a correct explanation for balanced forces acting on an object?
The speed of the object decreases.
The direction of the object changes.
The speed of the object increases.
The motion of the object stays the same.
What is the Net Force of this picture?
4700 N --->
4700 N <-----
300 N ----->
300 N <------
A driver is headed north at 50 km/hr. A box is sitting on the seat next to him.
Which action by the driver would most likely cause him to observe the box appear to slide to the west?
Applying the brakes
Speeding up to 60 km/hr
Making a turn to the west
Making a turn to the east
I don't know the answer at this time.
When dropped from the same height, why does a flat sheet of paper fall more slowly than the same sheet when it's tightly crumpled into a ball?
The sheet of paper has less mass when it's flat than it does when it's crumpled
The sheet of paper weighs less when it's flat than it does when it's crumpled
The force of gravity has a greater effect on the crumpled paper than it does on the flat paper.
The flat piece of paper has a greater surface area and encounters more air resistance than when it is crumpled.
I don't know the answer at this time.
A teacher dropped one light ball and one heavy ball from the roof of a school building at the same time. Both balls hit the ground at the same time. The students correctly concluded from this experiment that falling objects:
lose mass as they fall
are influenced by the height of the building
do not accelerate under the influence of gravitational force
accelerate at the same rate, regardless of mass, due to the force of gravity
I don't know the answer at this time.
How could you increase the gravitational potential energy of an object without changing its mass and gravity?
Make the object larger
Lower the object towards the ground
Raise the object farther off the ground
Allow the object to roll on the ground
Newton's second law states that greater the mass the more _________ will be needed to move the object.
power
force
distance
speed
An object accelerates if it speeds up, slows down, or changes directions.
True
False
When all individual forces acting on an object are balanced, it is the natural tendency of an object to _____. List all that apply in alphabetical order with no spaces between letters.
maintain its state of motion
eventually stop
accelerate
either speed up, slow down or keep the same speed
keep its velocity constant (either at a zero or non-zero value)
The law of inertia (Newton's first law) applies _____.
to moving objects only
only to objects that are not moving
to both moving and nonmoving objects
Inertia refers to _____
the tendency of moving objects to remain in motion
the force which keeps moving objects in motion with a constant velocity
the force that keeps stationary objects at rest
the tendency of stationary objects to remain at rest
A skateboard rolls down a hill, reaches the level surface and eventually comes to a stop. The fact that the skateboard ultimately stops is best explained by ____.
an unbalanced force would be required to keep the sled moving forward at constant speed
the presence of an unbalanced force (e.g., friction) can cause a moving object to stop
the presence of inertia causes it to stop
the natural tendency of any object is to ultimately stop
Inertia depends on ______
Velocity
Speed
Distance
Mass
List the objects in order from least to greatest inertia.
CDBA
ABCD
BCDA
CBAD
Mac and Tosh are arguing in the cafeteria. Mac says that if he flings the jello with a greater speed it will have a greater inertia. Tosh argues that inertia does NOT depend upon speed, but rather upon mass. Who is correct?
Mac
Tosh
Neither
Both
Collisions where objects BOUNCE apart.
inelastic collisions
elastic collisions
explosions
none of these
Momentum before = Momentum after
according to the Law of Conservation of __________________________.
Momentum
Energy
Force
Acceleration
Collision where objects collide, and stick together.
inelastic collision
elastic collision
explosion
none of these
Two Pool Balls collide and then go separate directions.
inelastic collision
elastic collision
explosion
none of these
For every action, there is an equal and opposite reaction.
Newton's 1st Law
Newton's 2nd Law
Newton's 3rd Law
none of these
Which TWO variables determine the MOMENTUM for an object?
time
velocity
density
mass
Which statement is not true?
The Earth attracts objects because it has a large mass.
You are attracting this Quiz paper with a small force of gravity.
Only large objects like the Earth produce a force of gravity.
Your body is attracting the Earth.
The direction ‘down’ is:
the same everywhere.
at right angles to the ground.
towards the centre of the Earth.
different under water.
On Mars, the strength of gravity is 9 N/kg.
If your mass is 50 kg, how much would you weigh on Mars?
450N
90N
50N
45N
The event horizon of a black hole represents:
The moment when the black hole formed.
The boundary beyond which nothing can escape.
The density limit of a black hole.
None of these
Infinitely dense points that make the core of black holes.
Accretion Disk
Event Horizon
Singularity
Worm Hole
As an object becomes less massive, the force of gravity...
less mass = stronger force
less mass = weaker force
less mass = no change in the force
None of the above
Which of the following situations would result in a stronger force of gravity?
Decreasing the brightness of a star
Bringing to objects closer together
Decreasing one object's mass
No change in an object's mass
There are two twins on Earth. One flies off on a spacecraft traveling 90% of 'c' while the other twin stays on Earth. Which of the following is TRUE?
The twin on the spacecraft will age more slowly than the Earth-bound sibling
Time in each frame of reference proceeds differently at different speeds
This is an example of the 'Twin Paradox'
All answers are true
The speed of light _________________.
is constant in all frames of reference
changes based on frame of reference
speeds up even faster in different frames of reference
stops when in different frames of reference
General Relativity combines
Matter and Energy
Space and Time
Particles and forces
Particles and waves
General Relativity is a theory of...
Quantum mechanics
Orbital motion
Light
Gravity
