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Worksheets8th Grade Phys Sci Review 3 - S8P3 (with graphs)
Total questions: 120
Worksheet time: 2hrs 30mins
Which two of the following are accelerating?
a comic book that is sliding across a coffee table with decreasing speed
a heavy textbook that a student is lifting straight up at a constant speed
a partially finished coloring book that a girl is waving in a circle
Which one of the following is accelerating?
an SUV that is cruising north at a steady speed
a mini van that is parked in a driveway during a storm
a mail truck that is slowing down as it approaches a mailbox
Which of the following are accelerating? (There are more than one!)
a cantaloupe that is curving to the right as it rolls down the aisle of a grocery store
a heavy coconut that is speeding up as it falls from a tree toward the ground
a pomegranate that is flying upward with decreasing speed after being tossed in the air
a truck that is moving at 70 mph on a very straight section of the interstate
A motorcycle traveling at a constant speed is swerving to the right to avoid a pothole. Select the two correct answers that describe the motorcycle's motion.
The motorcycle has constant velocity.
The motorcycle has a changing velocity.
The motorcycle is accelerating.
The motorcycle has zero acceleration.
A piece of driftwood is floating straight down a stream at a constant speed. Select the two correct answers that describe the driftwood's motion.
The driftwood has constant velocity.
The driftwood has increasing velocity.
The driftwood has decreasing velocity.
The driftwood is accelerating.
The driftwood has zero acceleration.
A sled is slowing down at the bottom of a snowy hill. Select the two correct answers that describe the sled's motion.
The sled has constant velocity.
The sled has increasing velocity.
The sled has decreasing velocity.
The sled is accelerating.
The sled has zero acceleration.
An antelope is running faster and faster away from a hungry lion. Select the two correct answers that describe the antelope's motion.
The antelope has constant velocity.
The antelope has increasing velocity.
The antelope has decreasing velocity.
The antelope is accelerating.
The antelope has zero acceleration.
A golf ball is sitting still on the grass three feet from the hole. Select the two correct answers that describe the golf ball's motion.
The golf ball has constant velocity.
The golf ball has increasing velocity.
The golf ball has decreasing velocity.
The golf ball is accelerating.
The golf ball has zero acceleration.
Ross and Kenneth are playing tug-of-war. Ross is pulling on one end of a rope with a force of 230 N. Kenneth is pulling on the other end of the rope with a force of 300 N. Based on only the forces described, which statement describes the forces on the rope?
The forces are balanced, so there is no net force on the rope.
The forces are balanced, so there is a net force on the rope.
The forces are unbalanced, so there is no net force on the rope.
The forces are unbalanced, so there is a net force on the rope.
A calico cat is asleep in a box. Earth's gravity is pulling down on the cat with a force of 40 N. The bottom of the box is pushing up on the cat with a force of 40 N. Based on only the forces described, which statement describes the forces on the cat?
The forces are balanced, so there is no net force on the cat.
The forces are balanced, so there is a net force on the cat.
The forces are unbalanced, so there is no net force on the cat.
The forces are unbalanced, so there is a net force on the cat.
Maria is sliding a heavy dresser across the carpeted floor of her apartment. She is pushing the dresser forward with a force of 350 N. The carpet is pushing the dresser backward with a force of 380 N. Based on only the forces described, which statement describes the forces on the dresser?
The forces are balanced, so there is no net force on the dresser.
The forces are balanced, so there is a net force on the dresser.
The forces are unbalanced, so there is no net force on the dresser.
The forces are unbalanced, so there is a net force on the dresser.
An ice cube is floating in a glass of water. Earth's gravity is pulling down on the ice cube with a force of 0.1 N. The water is pushing up on the ice cube with a force of 0.1 N. Based on only the forces described, which statement describes the forces on the ice cubes?
The forces are balanced, so there is no net force on the ice cubes.
The forces are balanced, so there is a net force on the ice cubes.
The forces are unbalanced, so there is no net force on the ice cubes.
The forces are unbalanced, so there is a net force on the ice cubes.
Julie is walking her dog. A squirrel just ran by, and Scout is pulling forward on the leash with a force of 250 N. Julie is pulling backward on the leash with a force of 180 N. Based on only the forces described, which statement describes the forces on the leash?
The forces are balanced, so there is no net force on the leash.
The forces are balanced, so there is a net force on the leash.
The forces are unbalanced, so there is no net force on the leash.
The forces are unbalanced, so there is a net force on the leash.
Toby, Denise, and Brennan are spreading out a tarp for their campsite. Toby and Denise are pulling the tarp to the left. Toby is pulling the a force of 140 N, and Denise is pulling with a force of 120 N. Brennan is pulling the tarp to the right with a force of 260 N. Based on only the forces described, which statement describes the forces on the tarp?
The forces are balanced, so there is no net force on the tarp.
The forces are balanced, so there is a net force on the tarp.
The forces are unbalanced, so there is no net force on the tarp.
The forces are unbalanced, so there is a net force on the tarp.
Irene and Joel are trying to open their garage door because the remote is broken. Irene is pulling up on the garage door with a force of 320 N. Joel is pulling up on the garage door with a force of 300 N. Earth's gravity is pulling down on the garage door with a force of 600 N. Based on only the forces described, which statement describes the forces on the garage door?
The forces are balanced, so there is no net force on the garage door.
The forces are balanced, so there is a net force on the garage door.
The forces are unbalanced, so there is no net force on the garage door.
The forces are unbalanced, so there is a net force on the garage door.
Dakota is sitting on a porch swing while her young son sits in her lap. Earth's gravity is pulling down on Dakota with a force of 800 N. Dakota's son is pushing down on her with a force of 300 N. The swing is pushing up on Dakota with a force of 1100 N. Based on only the forces described, which statement describes the forces on Dakota?
The forces are balanced, so there is no net force on Dakota.
The forces are balanced, so there is a net force on Dakota.
The forces are unbalanced, so there is no net force on Dakota.
The forces are unbalanced, so there is a net force on Dakota.
Carson and Robert are pushing their kayak across the grass toward a lake. Carson is pushing the kayak forward with a force of 400 N. Robert is pushing the kayak forward with a force of 300 N. The grass is pushing the kayak backward with a force of 600 N. Based on only the forces described, which statement describes the forces on the kayak?
The forces are balanced, so there is no net force on the kayak.
The forces are balanced, so there is a net force on the kayak.
The forces are unbalanced, so there is no net force on the kayak.
The forces are unbalanced, so there is a net force on the kayak.
Some pilots of hot-air balloons are getting ready to launch their balloons. Each pilot lights the flame to heat the air in her balloon. Then, the surrounding air applies a force to each balloon to lift it up. Each hot-air balloon has the same acceleration as it starts to rise. Based on the chart, order the colors from greatest to least to show the size of the force applied to each balloon.
magenta, coral, turquoise, violet, cyan
cyan, violet, turquoise, coral, magenta
coral, cyan, magenta, turquoise, violet
violet, turquoise, magenta, cyan, coral
People are riding buses to work in the morning. The buses are all the same, but they are carrying different numbers of people. The buses are going the same speed, and each bus is one block away from its next stop. Based on the chart, order the buses from least to greatest to show the size of the force applied to each bus.
B43, M2, CT5, X9, SL1
SL1, X9, CT5, M2, B43
B43, CT5, M2, SL1, X9
X9, SL1, M2, CT5, B43
Acrobats are being thrown by a catapult during a performance. The catapult applies the same force to each acrobat's feet. Based on the chart, order the acrobats from least to greatest to show the size of the acceleration the acrobats will have as they are being thrown.
Vince, Mika, Troy, Olivia, David
Troy, Mika, David, Vince, Olivia
Olivia, Vince, David, Mika, Troy
David, Olivia, Troy, Mika, Vince
Horses are walking side by side while each pulls a cart from the field to the barn. The carts are identical, but each has a different load of objects. It starts to rain, and the horses speed up. Each horse pulls with the same force to get back to the barn quickly. Based on the chart, order the loads from greatest to least to show the size of the acceleration each cart will have.
bundle of wheat, large stone, bag of soil, sack of compost
sack of compost, bag of soil, large stone, bundle of wheat
bag of soil, bundle of wheat, large stone, sack of compost
sack of compost, large stone, bundle of wheat, bag of soil
Carol tries to push a bookshelf across the room. As much as she tries, she can not get the bookshelf to move. Which statement best describes why the bookshelf is not moving?
Carol did not apply enough force to the bookshelf and so the forces are unbalanced.
Carol did not apply enough force to accelerate the bookshelf and so the forces are still balanced.
Carol applied too much force to the bookshelf and now the forces on the bookshelf are balanced.
Carol applied too much force to the bookshelf and now the forces on the bookshelf are unbalanced.
How is a space shuttle able to leave Earth's surface?
The space shuttle's engines create an upward force greater than the downward force of gravity.
The space shuttle's engines create a downward force greater than the upward force of gravity.
The space shuttle's engines create an upward force less than the downward force of gravity.
The space shuttle's engines create a downward force less than the upward force of gravity.
Katrina pushes off a flat sidewalk on her new skateboard. What causes her to move?
The force of her push overcomes the forces of gravity and friction.
The force of gravity overcomes the forces of her push and friction.
The force of friction overcomes the normal force of the skateboard and the force of gravity.
The normal force of the skateboard overcomes the force of her push and the force of gravity.
The picture shows two teams playing tug-of-war. If the force of each team is balanced by the other, then
both teams will fall to the ground.
both teams will move to the right.
both teams will move to the left.
both teams will remain in place.
The car is moving to the right. Which of the following explanation best describes the motion of the car?
The speed of the car is increasing to the right because the rightward force is 1000 Newtons.
The speed of the car is decreasing because the leftward force is greater than the rightward force.
The car is moving to the left because the leftward force is greater than the rightward force.
The car is at rest because the upward and downward forces are equal and opposite.
During which intervals is the object traveling at a constant velocity?
A to B
D to E
F to G
it traveling at a constant velocity during all of the intervals shown.
During which interval are the forces on the object BALANCED (Net Force= 0 N)?
A to B
B to C
D to E
E to F
Which side has more force?
Left
Right
Which side will win?
Left
Right
Tamara exerts a force downward on a chair by sitting on it. Using Newton's 3rd Law, select the statement that best explains why the chair does not move downward.
The chair exerts an upward force that is greater than the force exerted by Tamara.
The floor exerts an upward force that is greater than the force exerted by Tamara.
The chair exerts an upward force that is greater than the downward force exerted by Tamara.
The floor exerts an upward force on the chair that balances the downward force exerted by Tamara.
Sam was learning how to roller-skate. He did not want to go very fast. On which kind of floor surface would Sam travel the slowest?
carpet
concrete
tile
wood
Oliver the dog doesn’t want to walk in the rain. He can make his owner pull harder on the leash in order to get him out the door by
sitting on a vinyl floor
sitting on a tile floor
sitting on the carpet floor
sitting on the wood floor
What is the net force on the block?
5 Newtons up
5 Newtons down
15 Newtons up
15 Newtons down
5-6 seconds using the speed vs. time graph
In the image, which of person and bike will get down a hill faster?
The boy because he is younger
The woman because she is stronger
The boy because he has a greater mass which applies a greater force
The woman because she has more mass and applies a greater force
If you change an object’s speed or direction, you are changing its _________.
force
velocity
momentum
inertia
What is happening at segment B?
no motion/object at rest
constant speed
acceleration
Negative acceleration
What is line C showing?
The object is stationary
The object is accelerating
The object is going at a slower steady speed; moving away from the starting position
The object is going at a steady speed; returning to start position
The graphs show the distance and time traveled by objects x and y. Which statement is correct about the two objects?
Neither object is traveling at a constant speed and object x is traveling slower than object y.
Both are traveling at a constant speed but object x is traveling faster than object y.
Objects x and y are traveling at the same speed.
Objects x and y are speeding up over time.
The graph represents what form of acceleration
No motion
Constant velocity
Acceleration
Deceleration
The graph represents what form of velocity
no motion
Constant velocity
Acceleration
negative acceleration
A force that opposes motion between any surfaces that are touching
velocity
friction
inertia
position
Newton's First Law ...
at rest stays at rest, in motion stays in motion (AKA inertia)
force equals mass x acceleration
no motion
for every action there's an equal and opposite reaction
Newton's Second Law
at rest stays at rest, in motion stays in motion (AKA inertia)
for every action there's an equal and opposite reaction
force = mass x acceleration
Newton didn't have a 2nd law
Newton's Third Law
at rest stays at rest, in motion stays in motion (AKA inertia)
for every action there's an equal and opposite reaction
force = mass x acceleration
Newton didn't have a 3rd law
If a car is not speeding up or slowing down it has
constant velocity
positive velocity
negative velocity
no velocity
20 n→ ←15 n .... what will happen?
nothing
accelerate to the right with 5n
accelerate left with 5n
forces will cancel out
Which object would accelerate the most if 200 n of force was applied to it?
10 kg
12 kg
15 kg
100 kg
Why does an object rolling down a hill come to a stop?
friction
gravity
inertia
time
The graph shows the speed of a vehicle over time.
How far did the vehicle travel during the first two seconds?
0.2 m
5 m
10 m
20 m
If acceleration decreases while the force stays the same, then the mass must have
Increased
Decreased
Stayed the same
Why do some competitive swimmers shave their heads and bodies?
decrease weight
decrease friction
increase buoyancy
increase blood flow
Manuel is coasting on his bike. Because he is not pedaling, his bike will come to a stop. Which of these will cause Manuel’s bike to stop?
An increase in kinetic energy
Earth’s magnetic field
The property of inertia
The force of friction
Katie sent a soccer ball toward Anthony on a flat field. The ball started moving because of which force?
her kick
gravity
friction
air inside the ball
How much force is needed to accelerate a 130 pound runner at 2 m/sec?
A 50 pound dog pushed by his owner at 5 m/sec has how much force?
Assuming the only two forces on a rocket are lift and gravity, which of the following combinations would result in the rocket moving upward?
Lift = 5 newtons / gravity = 5 newtons
Lift = 3 newtons / gravity = 4 newtons
Lift = 5 newtons / gravity = 4 newtons
Lift = 4 newtons / gravity = 4 newtons
A weightlifter holding a barbell above his head. The force of gravity pulling down on the barbell is 756 newtons (N). How many newtons of force are exerted by the weightlifter to hold the barbell up?
0N
756N
378N
1512N
A cart is being pushed over a smooth surface with a constant force. After five seconds, the cart starts moving over a rough surface. How will the cart be affected once the surface changes?
The cart's inertia will increase.
The cart's velocity will increase.
The cart's friction will decrease.
The cart's acceleration will decrease.
Which direction is air friction going?
to the left
to the right
downward
upward
What unit is used to measure force?
Kilogram
Meter
Pascal
Newton
Calculate the Net Force.
60N, Left
40N, Right
0 N
60N, Right
1st
Law of Motion
2nd
Law of Motion
3rd
Law of Motion
1st
Law of Motion
2nd
Law of Motion
3rd
Law of Motion
1st
Law of Motion
2nd
Law of Motion
3rd
Law of Motion
Friction is a force that acts in a direction ___________ of movement.
similar
opposite
parallel
perpendicular
1st
Law of Motion
2nd
Law of Motion
3rd
Law of Motion
1st
Law of Motion
2nd
Law of Motion
3rd
Law of Motion
1st
Law of Motion
2nd
Law of Motion
3rd
Law of Motion
"An object in motion (or at rest) will to stay in motion (or at rest) until an outside force acts upon it."
Newton's 1st Law
Newton's 2nd Law
Newton's 3rd Law
Newton's 4th Law
What was occurring from point B to point C?
Calculate the net force shown in the diagram.
6 N
0 N
3 N
9N
How do we know when an object is actually in motion?
by comparing it to a stationary reference point
by comparing it to itself
by comparing it to us
by comparing it to another moving object
What is displacement?
the distance an object has moved
the speed at which an object has moved
the distance (with a direction) an object is from its place of origin
the direction an object has moved from its place of origin
