Ga Milestone Review Force and Motion

8th Grade Physical Science Ga Milestone Review Force and Motion

By Sierra Lawhorne

Multiple Choice

Identify whether the following statement describe a change in acceleration. Explain your response:

A car stopped at a stop sign

• change in acceleration; because the velocity is changing

• there is no change in acceleration; the velocity is constant

• change in acceleration; the velocity is constant

• there is no change in acceleration; the velocity is changing

Multiple Choice

Identify whether the following statement describe a change in acceleration. Explain your response:

A boat traveling east at 10 knots

• change in acceleration; because the velocity is changing

• there is no change in acceleration; the velocity is constant

• change in acceleration; the velocity is constant

• there is no change in acceleration; the velocity is changing

Multiple Choice

Identify whether the following statement describe a change in acceleration. Explain your response:

An airplane traveling north 600 miles per hour

• change in acceleration; because the velocity is changing

• there is no change in acceleration; the velocity is constant

• change in acceleration; the velocity is constant

• there is no change in acceleration; the velocity is changing

Multiple Choice

Identify whether the following statement describe a change in acceleration. Explain your response:

A person running at 5 meters/second along a curved path

• change in acceleration; because the velocity is changing

• there is no change in acceleration; the velocity is constant

• change in acceleration; the velocity is constant

• there is no change in acceleration; the velocity is changing

Multiple Choice

Describe what is meant by "a constant change of direction". Identify whether the example provided show a constant change of direction when moving.

A merry-go-round spinning in circles.

• A constant change in direction means that the direction of an object is constantly changing; the examples shows a constant change of direction

• A constant change in direction means that the direction of an object is not changing; the examples shows a constant change of direction

• A constant change in direction means that the direction of an object is constantly changing; the examples does not shows a constant change of direction

• A constant change in direction means that the direction of an object is not constantly changing; the examples does not shows a constant change of direction

Multiple Choice

Describe what is meant by "a constant change of direction". Identify whether the example provided show a constant change of direction when moving.

A wind vane swinging around

• A constant change in direction means that the direction of an object is constantly changing; the examples shows a constant change of direction

• A constant change in direction means that the direction of an object is not changing; the examples shows a constant change of direction

• A constant change in direction means that the direction of an object is constantly changing; the examples does not shows a constant change of direction

• A constant change in direction means that the direction of an object is not constantly changing; the examples does not shows a constant change of direction

Multiple Choice

Describe what is meant by "a constant change of direction". Identify whether the example provided show a constant change of direction when moving.

A kid walking on a straight path

• A constant change in direction means that the direction of an object is constantly changing; the examples shows a constant change of direction

• A constant change in direction means that the direction of an object is not changing; the examples shows a constant change of direction

• A constant change in direction means that the direction of an object is constantly changing; the examples does not shows a constant change of direction

• A constant change in direction means that the direction of an object is not constantly changing; the examples does not shows a constant change of direction

Multiple Choice

The graph below shows how the speed of a bus changes during part of a journey. In Segment B-C, the bus is ________________ (accelerating; decelerating; at rest; at constant speed) Why?

*Do not forget to explain on your paper.

• accelerating

• decelerating

• at rest

• at constant speed

Multiple Choice

The graph below shows how the speed of a bus changes during part of a journey. In Segment C-D, the bus is ________________ (accelerating; decelerating; at rest; at constant speed) Why?

*Do not forget to explain on your paper.

• accelerating

• decelerating

• at rest

• at constant speed

Multiple Choice

Which segment(s) is accelerating? How do you know? Choose all that apply

*Don't forget to explain on your paper.

• O-A

• A-B

• C-D

• D-E

• B-C

Multiple Select

The table to the right shows the time it takes three trucks to go from 0 to 60 km/h. Based on the information given, what data can be compared for the three trucks? Choose all that apply

• Truck 1 traveled the fastest speed

• Truck 2 traveled the fastest speed

• Truck 3 traveled the slowest speed

• Truck 1 traveled the slowest speed

• The traveled the same speed

Multiple Choice

On a frictionless surface, how does the increase in an object's mass affect its acceleration?

• the increase in an object's mass does not affect its acceleration

• As the object's mass increases the force needed to accelerate the object must increase

• As the object's mass increases the force needed to accelerate the object must decrease

• As the object's mass increases the force needed to accelerate the object must stay the same

Multiple Choice

At which point in the diagram above would the rate of acceleration be the greatest? Explain your answer.

• W

• X

• Y

• Z

Open Ended

Define Inertia

Multiple Choice

Identify which of the following objects has the most inertia: 3 g gumball; 2 kg tennis ball; 2 g ping pong ball; 5 kg basketball. Explain your answer.

• 3 g gumball

• 2 kg tennis ball

• 2 g ping pong ball

• 5 kg basketball

Multiple Choice

The diagram to the left shows a skier finishing a competition. What happens to his speed and direction as he rounds the finish line?

• As he rounds the finish line his direction changes therefore his speed changes.

• As he rounds the finish line his direction does not changes therefore his speed changes.

• As he rounds the finish line his direction does not change changes therefore his speed does not change.

• As he rounds the finish line his direction changes therefore his speed does not change.

Multiple Choice

According the the graph to the left, what was the acceleration of the object between Points R and S? Explain your answer.

• 20 meters per second

• 20 meters per second squared

• 0 meters per second squared

• 0 meters per second

Multiple Choice

What does the graph to the right illustrate about the speed of an object?

• The speed is constant

• The speed in decreasing

• The speed increases and then decreases

Multiple Choice

The diagram to the right shows a cart full of blocks coming to a sudden stop. Explain what happens to the block in the cart.

• The block stops too.

• The block moves in the opposite direction than the direction that the cart was moving in.

• The block continues to move in the direction that the cart was moving in.

Multiple Choice

The diagram to the right shows a man trying to walk a dog, but the man and the dog are moving in the same direction. Draw an arrow below the diagram showing the direction of movement and describe the forces in this situation (balanced, unbalanced, which force is greater).

• --->; balanced; the pulling force of the dog is greater

• <----; balanced; the pulling force of the man is greater

• --->; unbalanced; the pulling force of the dog is greater

• <---; unbalanced; the pulling force of the man is greater

Multiple Choice

A tractor company decides to reduce the mass of its tractor by 100 kg. The new tractor design is identical to the old design in everything other than weight. Compare the force it would take to move the old tractor to the force it would take to move the new tractor.

*Explain on your paper.

• The force needed to move the new tractor must be greater

• The force needed to move the new tractor is the same

• The force needed to move the new tractor will be less

• None

Multiple Choice

Describe the principle "Every action has an equal and opposite reaction".

• Newton's First Law of Motion

• Newton's Second Law of Motion

• Newton's Third Law of Motion

• Newton's Fourth Law of Motion

Poll

A group of elementary students were playing shuffle board on the playground. One student pushed the puck toward the opposite side of the game board. The student thought the puck would continue all the way to the other side, but the puck stopped half-way down the board. Explain in terms of force why the puck failed to slide all the way to the opposite side of the board.

• The force of friction slowed the puck down and prevented the puck from sliding all the way to the opposite side.

• The force of air resistance slowed the puck down and prevented the puck from sliding all the way to the opposite side.

• The force of gravity slowed the puck down and prevented the puck from sliding all the way to the opposite side.

• The force of e slowed the puck down and prevented the puck from sliding all the way to the opposite side.

Multiple Choice

Look at the diagram of the box to the right. In which direction will the box increase in speed? Explain your answer.

*Don't forget to explain on your paper.

• left and up

• right and down

• up and right

• up and left

Multiple Choice

Carts 1 and 2 in the diagram to the right have a compressed spring between them. The carts are held together by a cord. When the cord is cut, the compressed spring will force the carts apart. When this happens, how will the acceleration of Cart 1 differ from that of Cart 2? Explain your answer.

• Cart 1 will accelerate faster than cart 2 because it has a greater mass.

• Cart 2 will accelerate faster than cart 1 because it has a lesser mass.

Multiple Choice

The picture to the right shows a pulley being used to move a 6 kg block. In which direction will the block move if the force applied to the rope is greater than the force of gravity on the load?

• downward

• upward

• the left

• the right

Multiple Choice

A force (F1) is required to push a 15kg container across a carpeted floor. A force (F2) is required to push the same 15kg container across the ice at a rink. What is typically true about the F1 force in comparison to the F2 force?

• F1 force will be larger because the carpet creates more friction

• F1 force will be smaller because the carpet creates more friction

• F2 force will be larger because the skating rink creates for friction

• None apply

Multiple Select

How does the distance between objects and their mass affect gravitational attraction (force) between the two objects? Choose all that apply

• The greater the distance between objects the greater the gravitational force.

• The closer the distance between objects the greater the gravitational force.

• The greater the mass of one object, the greater the gravitational force that object has on a less massive object.

• The greater the mass of one object, the less the gravitational force that object has on a less massive object.

Multiple Choice

The diagram to the right shows a moon revolving around a planet in an orbit. At which location is the gravitational pull between the moon and the planet the weakest? Explain your answer in your study guide.

• 1

• 2

• 3

• 4