Quiz about Forces

Question 1

Brian and Emily are testing different paper airplane designs to see which will allow a plane to go the farthest. Emily folds her plane and attaches a paperclip to the front of it. After she throws the plane, it travels about fifty feet and then starts to fall to the ground.
Why does the plane eventually fall to the ground?

Accepted Answer

The force of gravity is greater than the forces keeping the plane in the air

Answer

The force of air resistance stops acting on the plane

Answer

The plane was not designed to carry a load like the paperclip

Answer

The paperclip creates a magnetic force that attracts the plane to the ground.

Question 2

Aaron is playing with a soccer ball at the top of a hill. Aaron kicks the ball and it rolls down the hill. Which of the following best describes what happens as the ball rolls?

Accepted Answer

The force of gravity pulls the ball downhill

Answer

The force of friction causes the ball to roll faster down the hill

Answer

The force of gravity is balanced by air resistance acting on the ball

Answer

The force of friction is greater than the force of gravity acting on the ball

Question 3

While Carmen is at the park with her family, she walks up to a wishing well. She throws a penny down the well, and she hears a splash at the bottom. Which of the following best describes what happens as the penny falls?

Accepted Answer

The force of air resistance acts against gravity, but it is not enough to overcome gravity

Answer

The force of gravity is equal to the air resistance acting on the penny

Answer

The magnetic force of the well attracts the penny and causes it to fall even faster

Answer

The force of friction acts against air resistance, causing the penny to fall even faster

Question 4

Because the force of gravity is so strong, it appears to attract all objects equally, regardless of mass. Which of the following is illustrated by this idea?

Accepted Answer

A bowling ball and a peanut will fall to the ground at the same rate when someone drops them

Answer

Earth orbits the Sun in the same amount of time it takes the Moon to orbit Earth

Answer

A rubber ball will bounce much higher than a wooden ball, even if they weigh the same

Answer

Magnets can both repel and attract each other, depending on how they come into contact

Question 5

Which of the following explains why a parachute makes a person falling from a great height fall more slowly?

Accepted Answer

The parachute causes air resistance, which slows the fall

Answer

The parachute reduces the friction in the air

Answer

The parachute pulls upward, so the fall is slower.

Answer

The parachute decreases the pull of gravity on the person wearing it

Question 6

Gravity gets weaker as you travel farther from the surface of Earth. Which of the following examples correctly illustrates this idea?

Accepted Answer

Astronauts can float because Earth's gravity is not as strong in orbit.

Answer

Satellites that orbit Earth will always fall back to Earth eventually.

Answer

Airplanes can fly because there is much less gravity high in the sky.

Answer

here is no gravity on the Moon because it is too far away from Earth.

Question 7

Magnets have a negative and positive pole. What happens if you try to touch the positive ends of two magnets together?

Accepted Answer

The positive poles will repel each other

Answer

The positive poles will be attracted to each other

Answer

The positive poles will neither attract nor repel each other

Answer

The positive poles will create gravity and attract other objects

Question 8

A toy car rolling along different surfaces will experience different amounts of friction. The toy car would encounter the most friction when rolling on which of the following surfaces?

Accepted Answer

a sandy beach

Answer

a sheet of glass

Answer

a smooth wooden board

Answer

a piece of construciton papar

Question 9

Which of the following best explains why a person standing on the Moon can jump higher than a person standing on Earth?

Accepted Answer

The Moon's gravitational pull is less than Earth's

Answer

There is no gravity on the Moon

Answer

Everything has less mass on the Moon

Answer

Earth's gravity is very weak on the Moon

Question 10

Magnets have a negative and positive pole. What happens if you try to touch the positive pole of one magnet to the negative pole of another magnet?

Accepted Answer

The negative and positive poles will be attracted to each other

Answer

The negative and positive poles will repel each other.

Answer

The negative and positive poles will cancel each other out

Answer

The negative and positive poles will neither attract nor repel each other

Question 11

David and Peter were moving a bookshelf across the carpet in their classroom. Even though they pushed as hard as they could, the bookshelf would only move a few inches at a time.
Which of the following best explains what happened as they tried to push the bookshelf?

Accepted Answer

The force of friction opposed the motion of the bookshelf

Answer

The force of gravity opposed the motion of the bookshelf

Answer

When they tried to push the bookshelf, air resistance acted against them

Answer

When they pushed the bookshelf, the bookshelf pushed back with an equal and opposite force

Question 12

Philip is playing tug of war with Nancy. They both understand that to win the game of tug of war, one player must pull the flag over their opponent's line, but during this particular game, the flag tied to the center of the rope is not moving.
What is happening to the rope in this example?

Accepted Answer

Philip and Nancy are applying equal forces in opposite directions

Answer

Philip is applying more force in one direction

Answer

Nancy is applying more force in one direction

Answer

Philip and Nancy are applying equal forces in the same direction

Question 13

While on a camping trip, Shane and Katie are traveling in a boat on a river. On their trip, the river's current carries them down the river at a speed of 5 meters per second (m/s). They don't need to row because the current is carrying them in the direction they need to go.
If no other forces are acting on the boat, which of these statements describes the motion of the boat as it travels downstream?

Accepted Answer

it stays the same

Answer

it speeds up

Answer

it slows down

Answer

it changes direction

Question 14

Will and Tammy are moving a dresser. They are arguing about which direction to move it. Will is pushing the dresser with a force of 5 newtons towards Tammy. Tammy is pushing the dresser towards Will with a force of 10 newtons. What happens to the dresser?

Accepted Answer

The dresser moves towards Will

Answer

The dresser does not move

Answer

The dresser moves towards Tammy

Answer

The dresser moves towards Tammy, then back towards Will

Question 15

Maria pushes with equal force on two objects. Object 1 has twice as much mass as Object 2. Which of the following statements is true?

Accepted Answer

Object 2 will accelerate faster than object 1

Answer

Both objects will remain still

Answer

Object 1 will accelerate faster than object 2

Answer

Both objects will accelerate at the same rate

Question 16

Candice is rearranging the furniture in her room. She has two different dressers that are the same size. When she pushes on each dresser, she finds that it is harder to move Dresser A than it is to move Dresser B.
Why does Candice have to push with more force on Dresser A than on Dresser B?

Accepted Answer

Dresser A has more mass than Dresser B

Answer

Dresser A weighs less than Dresser B

Answer

Dresser A is larger in size than Dresser B

Answer

Dresser A has less volume than Dresser B

Question 17

Julian rides in her mother's car sometimes and in her father's car other times. If it takes her less time to travel the same distance in her mother's car than in her father's car, which of the following is true?

Accepted Answer

Her mother's car is traveling at a greater speed than her father's car

Answer

Her father's car is traveling at a greater speed than her mother's car

Answer

Both cars are traveling at the same speed since they travel the same distance

Answer

Both cars accelerate at the same rate, but her mother's car has a greater mass

Question 18

Jonathan pushes a box on the floor and is unable to make it move. Which of the following is the best explanation for why the box does not move?

Accepted Answer

The mass of the box requires a greater force to move it

Answer

The box has a very small mass

Answer

Jonathan is pushing in the wrong direction

Answer

Friction occurs in the same direction that Jonathan is pushing

Question 19

If all the forces acting upon an object at rest are balanced, what will the object do?

Accepted Answer

The object will stay still

Answer

The object will slow down

Answer

The object will accelerate

Answer

The object will change position

Question 20

Darryl pushes on two different boxes. Box 1 has a greater mass than Box 2. Which of the following statements is true?

Accepted Answer

Less force is required to move Box 2 than Box 1

Answer

Equal force is needed to move the boxes

Answer

Both boxes will accelerate at the same rate

Answer

Less force is required to move Box 1 than Box 2

Question 21

A student uses a toy car and ramp to investigate how surface affects the speed of a rolling object. What should the student intentionally change when doing this experiment?

Accepted Answer

The material on which the toy car rolls

Answer

The color of the toy car

Answer

The distance the toy car travels

Answer

The weight of the toy car

Question 22

Which two tools should be used together to measure speed?

Accepted Answer

Clock and a measuring tape

Answer

Balance and spring scale

Answer

Meter stick and barometer

Answer

Ruler and graduated cylinder

Question 23

A train is moving along a track. If the forces acting on the train are balanced, how will its motion be affected?

Accepted Answer

Continue, unchanged

Answer

Change direction

Answer

Speed up

Answer

Stop

Question 24

A force that occurs when an object rubs against another object

Accepted Answer

friction

Answer

thermometer

Answer

conduction

Answer

radiation

Question 25

Something that makes an object start moving, stop moving, speed up, or slow down is a(n) .

Accepted Answer

force

Answer

load

Answer

position

Answer

effort

Question 26

The tendency of an object to stay in motion or at rest until a force acts upon it is

Accepted Answer

inertia

Answer

gravity

Answer

speed

Answer

frame of reference

Question 27

A child rides a wagon down a hill. Eventually, the wagon comes to a stop. Which is most responsible for causing the wagon to stop?

Accepted Answer

friction acting on the wagon

Answer

gravity acting on the wagon

Answer

the mass of the wagon

Answer

the mass of the child

Question 28

Four different students take turns pushing a large, heavy ball on the school parking lot. What is the best way to determine which student used the most force to push the ball?

Accepted Answer

compare the distances that the ball rolled

Answer

compare the sizes of the students

Answer

compare the ages of the students

Answer

compare the number of times the ball was rolled

Question 29

A pencil falls off of a desk. What moves the pencil toward the floor?

Accepted Answer

gravity

Answer

mass

Answer

friction

Answer

speed

Question 30

Four solid balls, each with a different mass, are moving at the same speed. Which ball would require the most force to stop its motion?

Accepted Answer

ball with a mass of 20 kg

Answer

ball with a mass of 5 kg

Answer

ball with a mass of 10 kg

Answer

ball with a mass of 15 kg

Question 31

What can cause a moving object to increase its speed in a forward direction?

Accepted Answer

a force that continually acts on the object in the direction the object is moving

Answer

a force pushing on the object from the opposite direction

Answer

an increase in the mass of the object

Answer

a decrease in the mass of the object

Question 32

A helicopter traveled 200 miles in one hour. During the next hour, it traveled another 200 miles. Which best describes the average speed of the helicopter during the second hour?

Accepted Answer

exactly the same as the first hour

Answer

slower than the first hour

Answer

faster than the first hour

Answer

about the same as the first hour

Question 33

This graph shows the motion of an object. Which best describes the motion of the object?

Accepted Answer

It travels at constant speed and suddenly stops.

Answer

It is sitting still.

Answer

It is moving at a constant speed.

Answer

It continually increases its speed.

Question 34

Which investigation will best test the effects of gravity on moving objects?

Accepted Answer

pencils falling from the same height

Answer

balloons floating upward from the same height

Answer

a bicycle speeding up on a flat surface

Answer

a ball slowing down on a flat surface

Question 35

Which best describes the role friction plays in the operation of a car?

Accepted Answer

Friction helps a car slow down and stop.

Answer

Friction makes a car go faster.

Answer

Friction keeps a car from stopping.

Answer

Friction turns the car in a new direction.

Question 36

Carey left a bowling ball and kickball outside on a windy day. Which best explains why the kickball moved but the bowling ball did not?

Accepted Answer

The kickball has less mass so it was easier to move.

Answer

The force of gravity acting on the bowling ball is greater.

Answer

The mass of the kickball is greater so it is easier to move.

Answer

The force of gravity acting on the kickball is greater.

Question 37

Look at the people on the swings in the following illustration. The two boys are about to use the same force to push the people on the swings. Which of the following describes what will happen?

Accepted Answer

The child will accelerate more quickly than the parent.

Answer

The parent will swing higher than the child.

Answer

The parent will accelerate more quickly than the child.

Answer

The parent and the child will accelerate at the same rate.

Question 38

Rosa tried to pound a large nail into a board using a small hammer. Partway into the board, the nail stopped and would not move when she hit it. Rosa switched to using a heavier hammer, and the nail went into the board easily. Why did the larger hammer work when the small hammer did not?

Accepted Answer

The larger hammer had more mass, so it exerted more force when it hit the nail.

Answer

The nail could not push the larger hammer out of the way.

Answer

There is more friction between a large hammer and the nail.

Answer

The flat part of the larger hammer was wider, so it hit the nail better.

Question 39

The table shows the masses of several different objects. You want to toss each object a distance of 2 meters. Which object will require the most force to toss it 2 meters?

Accepted Answer

plastic disk

Answer

metal washer

Answer

rock

Answer

wooden block

Question 40

Suri places magnets on three identical toy cars to give them different masses. Then, Suri measures how far each car rolls when she launches it from the same starting point using the same stretched rubber band. The three toy cars are pictured in the following illustration. How will the force of the rubber band affect the cars?

Accepted Answer

Car 3 will have the least change in its motion.

Answer

Car 3 will travel the longest distance.

Answer

Car 1 will travel the shortest distance.

Answer

Car 1 will have the greatest change in its motion.

Question 41

Tori tests how far three identical toy cars travel under three different conditions. The following diagram shows the conditions before each car is released. How is Tori controlling variables in her experiment?

Accepted Answer

The mass will change for each trial, but the force will not change.

Answer

The mass and force will change for each trial.

Answer

Neither the mass nor force will change for each trial.

Answer

The force will change for each trial, but the mass will not change.

Question 42

Katie sits on the ground and rests her hands on a bowling ball in front of her. She uses all her force to push the bowling ball away from her body. Next, Katie rests her hands on a soccer ball situated in front of her at the same location. She uses all her force to push the soccer away from her body. How does the movement of the two balls contrast?

Accepted Answer

The soccer ball accelerates faster and moves a greater distance because it has less mass.

Answer

The soccer ball accelerates faster and moves a greater distance because more force is acting on it.

Answer

The bowling ball accelerates faster and moves a greater distance because it has more mass.

Answer

The bowling ball accelerates slower and moves a shorter distance because less force is acting on it.

Question 43

Anton is bowling with his friends. The diagram below shows the four different-sized bowling balls Anton tries. Anton bowls each ball down the same lane with the same force. Which size bowling ball would roll the fastest at first?

Accepted Answer

size 7

Answer

size 8

Answer

size 9

Answer

size 10

Question 44

A rock is balanced on the side of a long, sloping hill. Although the rock is very heavy, a gentle push causes it to start moving down the slope. How can a small force cause a large mass to move?

Accepted Answer

The forces on the rock were balanced, and a small additional force caused them to be unbalanced.

Answer

To make an object move, the direction of the force is important, but not the amount of force.

Answer

The push on the rock increased the amount of friction, so the rock started to move.

Answer

The small push balanced the forces that were keeping the rock in place and caused it to move.

Question 45

When Jean held a spring scale with a weight hanging on its hook, she observed that the force on the scale was 3 N. Why was the force greater than 0 N even though the weight was not moving?

Accepted Answer

The force was balancing the force of gravity.

Answer

The weight was not moving, but the forces on it were constantly changing.

Answer

The spring scale was broken, so it showed 3 N even though the real force was zero.

Answer

The spring scale read 3 N because that was the amount of unbalanced force on the weight.

Question 46

Jack is pulling a rope to the left. Singh is pulling the rope to the right. The rope stays in the same position. Which of these best explains why the rope does not move?

Accepted Answer

The two forces are equal and balance each other out.

Answer

The two forces are acting in the same direction.

Answer

Two forces cannot act on one object at the same time.

Answer

The force to the left is greater than the force to the right.

Question 47

Andrew put a rock in a bucket of water. The force of gravity acting on the rock caused it to sink to the bottom of the bucket. When the rock is on the bottom of the bucket, gravity acts on the rock and the bucket applies a force to the rock. Which statement best explains why the rock does not move?

Accepted Answer

The two forces are balanced.

Answer

The two forces act in the same direction.

Answer

The force of gravity is the greatest force on the rock.

Answer

The force applied by the bucket is more than the force of gravity.

Forces

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