Quiz about Equal and Unequal Forces

Question 1

Equal forces are-

Accepted Answer

forces that have the same strength.

Answer

forces that have different strengths.

Answer

one force that acts on both moving and nonmoving objects.

Answer

a force between surfaces that slows objects or stops them from moving.

Question 2

Unequal forces are-

Accepted Answer

forces that have different strengths.

Answer

forces that have the same strength.

Answer

one force that acts on both moving and nonmoving objects.

Answer

a force between surfaces that slows objects or stops them from moving.

Question 3

Friction is-

Accepted Answer

a force between surfaces that slows objects or stops them from moving.

Answer

forces that act together on an object without changing its motion

Answer

forces that do not cancel each other out and cause an object to change its motion.

Answer

one force that acts on both moving and nonmoving objects. A force that pulls objects.

Question 4

Which picture is an example of equal forces?

Accepted Answer

Question 5

Which picture is an example of friction?

Accepted Answer

Question 6

In the illustration, a brick is tied to the end of a rope. Why is the brick not moving?

Accepted Answer

The force of gravity on the brick is equal to the upward pull of the rope.

Answer

The force of gravity is gone because the brick is held up by the rope.

Answer

Both the force of gravity and the rope pull the brick upward.

Answer

The force of gravity is too strong for the brick to move.

Question 7

Observe the chart. Aida was investigating how forces affect the flight of a paper airplane. The chart shows her paper airplane flight. Are the forces acting on the airplane in the chart equal or unequal?

Accepted Answer

unequal forces, because gravity is pulling the airplane downward

Answer

equal forces, because the height of the airplane is not changing

Answer

equal forces, because the airplane does not have an engine

Answer

unequal forces, because the airplane is in motion above the ground

Question 8

Observe the photo of the glider in flight. When the glider starts to fall, which statement best explains the forces acting on it?

Accepted Answer

The upward force on the glider becomes weaker than the downward force of gravity.

Answer

The downward force on the glider becomes stronger than the weight of the glider.

Answer

The force of gravity changes direction to pull the glider downward.

Answer

The glider begins moving so slowly that only gravity can affect it.

Question 9

A mouse, a dog, and a boy each try to roll the same heavy bowling ball. The table shows the results. When were unequal forces acting on the ball?

Accepted Answer

when both the dog and boy rolled the ball

Answer

only when the mouse tried to roll the ball

Answer

only when the dog rolled the ball

Answer

when all three bowlers rolled or tried to roll the ball

Question 10

Observe the illustration. This illustration shows a toy car placed on a ramp. When the car is let go, it will begin to roll down the ramp. What can be concluded about the forces acting on the toy car as it is rolling?

Accepted Answer

The force pulling the car down the ramp is greater than the force of friction on the ramp.

Answer

The force pulling the car down the ramp is equal to the force of friction with the ramp.

Answer

The forces of gravity and friction both pull the car down the ramp.

Answer

The force of gravity is acting on the toy car, but the force of friction is not acting on it.

Question 11

This photo shows a game of billiards. The white cue ball strikes several other billiard balls on the table. Which statement best describes the transfer of energy during this event?

Accepted Answer

Unequal forces cause the struck balls to gain energy from the cue ball.

Answer

Unequal forces cause the cue ball and the other balls to gain energy.

Answer

Equal forces cause the cue ball and the other balls to lose energy.

Answer

Equal forces cause the struck balls to gain energy from the cue ball.

Question 12

Julio is pushing hard against the wall. Which arrow shows the force of the wall on Julio?

Accepted Answer

Arrow A

Answer

Arrow B

Answer

Arrow C

Answer

Arrow D

Question 13

Portia is holding a ball in her hand. When she lets go of the ball, what set of forces will be acting on the ball? Fill-in-the-blank below.

When Portia lets go of the ball, gravity will be the remaining force on the ball, and it will be a(n) _________ force. As a result, the ball will accelerate downward.

Accepted Answer

unequal

Answer

equal

Question 14

Marlene and Trevor are pushing equally hard on a heavy crate. Why is the crate not moving?

Accepted Answer

The forces are in the opposite direction, so the forces are equal.

Answer

The forces are in the opposite direction, so they are unequal forces.

Answer

The forces are in the same direction, so the forces are unequal.

Answer

The forces are contact forces, so the net force cannot be calculated.

Question 15

A car is traveling at 40 miles per hour. Which event requires an unequal force on the car? Select THREE correct answer choices.

Accepted Answer

coming to a stop at the traffic light

Accepted Answer

making a left or right turn

Accepted Answer

climbing up a hill or steep slope

Answer

continuing at 40 miles per hour down the road

Question 16

Holly inflates a balloon into different sizes. Then, she measures the distance the balloon rocket travels. Her results will MOST LIKELY support which hypothesis?

Accepted Answer

The greater the amount of air inside the balloon, the greater the unequal force.

Answer

A balloon rocket travels farthest when equal forces are applied to it.

Answer

The force on a balloon has no effect on the distance it travels.

Answer

The greater the force on a balloon, the slower the air rushes out of it.

Question 17

Thomas is holding a feather in one hand and a bowling ball in the other hand. How do the forces on the feather and the bowling ball compare to each other? Select THREE correct answers.

Accepted Answer

Equal forces are being applied to both the feather and bowling ball.

Accepted Answer

Thomas is applying a greater upward force to the bowling ball than to the feather.

Accepted Answer

Gravity is applying equal downward forces to both the bowling ball and the feather.

Answer

Gravity is applying a greater downward force to the bowling ball than to the feather.

Question 18

Observe the diagram of the apple at rest on a coffee table. Which arrow shows the force of the table on the apple?

Accepted Answer

Arrow C

Answer

Arrow A

Answer

Arrow B

Answer

Arrow D

Question 19

Gravitational force is-

Accepted Answer

a noncontact force of attraction between two objects.

Answer

forces that act together on an object without changing its motion

Answer

forces that do not cancel each other out and cause an object to change its motion.

Answer

a force between surfaces that slows objects or stops them from moving.

Question 20

Rougher surfaces have-

Accepted Answer

greater friction

Answer

less friction

Answer

the same level of friction

Equal and Unequal Forces

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