Quiz about Unit 3: Energy, Force and Motion Review

Question 1

Harry uses a pulley to put up a bucket of water from a well. Which of the following energy transformations also occurs as the bucket rises from the bottom of the well?

Accepted Answer

c. Energy is conserved as potential energy is transformed to kinetic energy.

Answer

a. Energy is gained as potential energy is transformed to kinetic energy.

Answer

b. Energy is gained as kinetic energy is transformed to potential energy.

Answer

d. Energy is conserved as kinetic energy is transformed to potential energy.

Question 2

The diagram above depicts a vehicle on its journey throughout the day. As the car moves from point A, to point B, and finally to point C, which of the following shows how the total energy of the car changes throughout the day?

Accepted Answer

c. The energy stays the same, but is converted between potential and kinetic energy

Answer

a. The energy decreases from point A to point B, then increases from point B to point C

Answer

b. The energy increases from point A to point B, then decreases from point B to point C

Answer

d. The energy is lost between points B and C and then lost between points A and B

Question 3

Refer to the diagram of a roller coaster to help you answer this question.

Ryan and his family are visiting a theme park and he wants to ride a roller coaster. At which point in the diagram would he expect to have the greatest amount of potential energy?

Accepted Answer

a) Point W

Answer

b) Point X

Answer

c) Point Y

Answer

d) Point Z

Question 4

Pam rubs a balloon on her head and then holds the balloon up against a wall. Why might the balloon stick to the wall?

Accepted Answer

c. Electric force causes particles in the balloon and the wall to attract.

Answer

a. Friction prevents the balloon from sliding down the wall.

Answer

b. A chemical reaction causes the balloon to stick to the wall.

Answer

d. Magnetism causes an attractive force between the balloon and the wall.

Question 5

When a pendulum swings, at which point is potential energy at its greatest?

Accepted Answer

1

Answer

2

Answer

3

Answer

4

Question 6

A group of people rented a fishing boat for the day and traveled far from land. Later they discovered they needed a compass to find their way back. Which of the following describes the force acting on the compass to guide them safely back to land?

Accepted Answer

C. Magnetic Force

Answer

A. Gravity

Answer

B. Electrical Force

Answer

D. Friction

Question 7

In 1969, Neil Armstrong became the first person to walk on the Moon. Video coverage showing the astronaut walking on the surface of the Moon gives the impression that he was bouncing while he walked. What is the reason for this?

Accepted Answer

D. The astronaut's weight on the Moon depends on the Moon's gravitational

Answer

A The astronaut's mass on the Moon decreases.

Answer

B. The density of the astronaut on the Moon is higher than on Earth.
force.

Answer

C. The atmosphere of the Moon affects the way the astronaut is able to move.

Question 8

According to the Law of Universal Gravitation, which satellite would experience the least amount of gravitational attraction to the Earth?

Accepted Answer

D. Satellite D

Answer

A. Satellite A

Answer

B. Satellite B

Answer

C. Satellite C

Question 9

Question 9.

Accepted Answer

B

Answer

A

Answer

C

Answer

D

Question 10

Question 10.

Accepted Answer

C

Answer

A

Answer

B

Answer

D

Question 11

Bao and Andrew are investigating forces. The following picture shows the forces acting on a sneaker.

If the sneaker remains motionless, which statement is true?

Accepted Answer

A. F and Ff have equal strength.

Answer

B. Ff has greater strength than F.B. Ff has greater strength than F.

Answer

C. F, Ff, Fg, and Fn all have exactly the same strength.

Answer

D. Fn and Ff have the same strength and F and Fg have the same strength.

Question 12

Imagine a weightless box floating in space. The picture to the right shows all the forces acting on this box. In what direction will this box accelerate?

Accepted Answer

Question 13

What is one possible interpretation of the section in the graph from point B to point C?

Accepted Answer

b) John waited before crossing a busy street.

Answer

a) John arrived at school and stayed throughout the day.

Answer

c) John returned home to get his math homework.

Answer

d) John reached the top of a hill and began walking on level ground.

Question 14

Which of these correctly describes the Potential and Kinetic energy of the bicycle rider?

Accepted Answer

When the rider is at the top of the hill, her Potential energy is the greatest, and her Kinetic the least.

Answer

As the rider moves up the hill, her Kinetic energy increases, and her Potential energy decreases.

Answer

When the rider goes down the hill, her Potential energy increases, and her Kinetic energy decreases.

Answer

As the rider reaches the bottom of the hill, her Kinetic energy and her Potential energy decrease.

Question 15

A child is sitting in a sled at the top of a snowy hill. Which statement is true regarding the position of the child?

Accepted Answer

The child has only potential energy.

Answer

The child has no potential energy.

Answer

The energy is changing from potential to kinetic.

Answer

The energy is changing from kinetic to potential.

Question 16

A student is going to push a ball off a table

Which statement best predicts how the energy of the ball will change immediately after the push?

Accepted Answer

Both potential energy and kinetic energy will increase

Answer

both potential energy and kinetic energy will decrease

Answer

Potential energy will decrease, and kinetic energy will increase

Answer

Potential energy will increase, and kinetic energy will decrease

Question 17

A marble is given potential energy by being placed at Location W. When the marble is released, it rolls down the track.

At which location does the marble have maximum kinetic energy?

Accepted Answer

Location Y

Answer

Location W

Answer

Location X

Answer

Location Z

Question 18

The graph above shows the distance the tennis ball traveled from its starting point in 5 seconds. What was the tennis ball's speed?

Accepted Answer

a. 0.5 m/s

Answer

b. 1.0 m/s

Answer

c. 1.5 m/s

Answer

d. 2.0 m/s

Question 19

Tao is drawing a graph that shows four different objects and the distance each object traveled in a 5 second period. Which line on the graph shows the object that is traveling with the fastest constant speed?

Accepted Answer

B. Line B

Answer

A. Line A

Answer

C. Line C

Answer

D. Line D

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