Quiz about Forces Review

Question 1

In science, force refers to

Accepted Answer

a push or pull on an object.

Answer

a moving object.

Answer

the way objects interact.

Answer

a description of an objects movement.

Question 2

When do forces always occur?

Accepted Answer

when two objects interact

Answer

when two objects are in motion

Answer

when one object is larger than another

Answer

when two objects are of the same size

Question 3

Forces are described using

Accepted Answer

strength and direction.

Answer

speed and direction.

Answer

motion and distance.

Answer

strength and distance.

Question 4

Which unit is used to measure the strength of forces?

Accepted Answer

newton (N)

Answer

kilowatt (kW)

Answer

megajoule (MJ)

Answer

pascal (Pa)

Question 5

Different strengths of forces can be modeled using

Accepted Answer

arrows of different lengths.

Answer

scales that measure different forces.

Answer

a table of different numerical values.

Answer

a graph of different numerical values.

Question 6

In the example of a swimmer interacting with a wall, the swimmer

Accepted Answer

exerts a force on the wall only.

Answer

exerts no force on any object.

Answer

exerts a force on herself only.

Answer

exerts a force on both herself and the wall.

Question 7

The net force on an object is found by...(same direction)

Accepted Answer

adding the forces.

Answer

dividing the forces.

Answer

subtracting the forces.

Answer

multiplying the forces.

Question 8

The net force of forces 15 N and 30 N is ______. (in the same direction)

Accepted Answer

45 N

Answer

2 N

Answer

15N

Answer

450 N

Question 9

For forces acting in opposite directions, the net force is found by

Accepted Answer

subtracting the forces.

Answer

adding the forces.

Answer

dividing the forces.

Answer

multiplying the forces.

Question 10

Brakes acting on a train car is an example of

Accepted Answer

the net force on an object being equal to one force on the object.

Answer

the net force on an object being positive.

Answer

the net force on an object slowly increasing.

Answer

the net force an object remaining the same over time.

Question 11

The difference between balanced and unbalanced forces is that

Accepted Answer

balanced forces have a net force equal to 0 N, while unbalanced forces do not.

Answer

balanced forces are multiples of 5 N, while unbalanced forces are not.

Answer

balanced forces have a net force unequal to 0 N, while unbalanced forces are equal to 0 N.

Answer

balanced forces have multiple forces that are equal to the same number, while unbalanced forces do not.

Question 12

The net force on an object that is at rest

Accepted Answer

is always 0 N.

Answer

changes depending on the location of the object.

Answer

is the result of unbalanced forces acting on the object.

Answer

depends on the balanced forces acting on the object.

Question 13

What is most likely to happen to a moving object with a net force of 0 N?

Accepted Answer

It will continue to move with the same velocity.

Answer

It will likely accelerate.

Answer

It will slowly come to a rest.

Answer

It will come to a complete stop.

Question 14

What is most likely to happen to a moving object with a net force of 0 N if an unbalanced force acts on it?

Accepted Answer

It will likely accelerate.

Answer

It will slowly come to a rest.

Answer

It will come to a complete stop.

Answer

It will continue to move with the same velocity.

Question 15

The greater the net force acting on an object, the greater the __________ of the object is.

Accepted Answer

acceleration

Answer

strength

Answer

given mass

Answer

individual forces

Question 16

If four dogs pull a sled with a net force of 100N, what will the net force MOST LIKELY be if eight dogs pull the sled?

Accepted Answer

200 N

Answer

25 N

Answer

50 N

Answer

100 N

Question 17

If sleigh dogs carry different masses for four different legs of a race, which of the following masses will likely have the greatest acceleration?

Accepted Answer

50 kg

Answer

100 kg

Answer

400 kg

Answer

1000 kg

Question 18

What are the three components of the equation for the second law of motion?

Accepted Answer

acceleration, force, and mass

Answer

speed, force, and mass

Answer

velocity, acceleration, and mass

Answer

force, velocity, and acceleration

Question 19

Which of the following describes gravitational force?

Accepted Answer

noncontact, attractive

Answer

contact, repulsive

Answer

contact, attractive

Answer

noncontact, repulsive

Question 20

What is likely to happen to the way an object moves if gravitational forces on the object do not change?

Accepted Answer

The object will move in predictable ways.

Answer

The object will move in unpredictable ways.

Answer

The object will be pushed slightly away from Earth.

Answer

The object will be pulled closer to the center of Earth.

Question 21

Which object has greater acceleration when acted on by gravitational forces? A 2 kg apple, a 7 kg bowling ball, or a 20 kg rock?

Accepted Answer

They all have the same acceleration when acted on by gravitational forces.

Answer

the 2 kg apple

Answer

the 7 kg bowling ball

Answer

the 20 kg rock

Question 22

An orbit is a path that

Accepted Answer

an object in space follows around another object due to gravitational forces.

Answer

an object follows as gravitational forces act on it.

Answer

an object that is changing acceleration follows as it changes speed or direction.

Answer

connects two objects that are being affected by the same gravitational forces.

Question 23

Gravitational forces that hold objects in space are also responsible for

Accepted Answer

the motions, groupings, and shapes of those objects.

Answer

the circular motion of all objects in space.

Answer

the formation of new landforms on Earth.

Answer

the motions, groupings, and shapes of objects on Earth.

Question 24

Why do gravitational forces form structures in space?

Accepted Answer

Stars and planets have very large masses, so gravitational forces work over large distances.

Answer

Stars and planets have very small masses, so gravitational forces work over large distances.

Answer

Stars and planets have very large masses, so gravitational forces work over very short distances.

Answer

Stars and planets have very small masses, so gravitational forces work over very short distances.

Question 25

What two factors determine the strength of the gravitational force between two objects? Text to speech

Accepted Answer

mass and distance

Answer

mass and speed

Answer

speed and distance

Answer

acceleration and distance

Question 26

Which of the following is true of the strength of gravitational forces between two objects at a distance?

Accepted Answer

Gravitational forces are stronger when objects are close and weaker when they are farther apart.

Answer

Gravitational forces are stronger near Earth and weaker near other objects.

Answer

Gravitational forces are the same regardless of the distance between the objects.

Answer

Gravitational forces are weaker when objects are close and stronger when they are father apart.

Question 27

Which of the following is true of the strength of gravitational forces between two objects in relation to mass?

Accepted Answer

Gravitational forces are greater when objects have a large mass.

Answer

Gravitational forces are weaker when objects have a large mass.

Answer

Gravitational forces are greater when objects have a small mass.

Answer

Gravitational forces are the same regardless of the mass of the objects.

Question 28

A force field models

Accepted Answer

the force on an object if the object were placed in any location in space.

Answer

the orbit of an object in space.

Answer

the force on an object if the object were placed in any location on Earth.

Answer

the force on an object if the object had no gravitational forces acting on it.

Question 29

The strength of a gravitational field ______ with an increase in distance.

Accepted Answer

decreases

Answer

varies

Answer

increases

Answer

stays the same

Question 30

An object's weight measures

Accepted Answer

the amount of gravitational force on an object.

Answer

the amount of matter in an object.

Answer

the location of an object in a gravitational field.

Answer

the distance between an object and the center of Earth.

Forces Review

42 questions

In science, force refers to

When do forces always occur?

Forces are described using

Which unit is used to measure the strength of forces?

Different strengths of forces can be modeled using

Newton’s third law of motion states that when an object exerts a force on a second object, the second object

In the example of a swimmer interacting with a wall, the swimmer

The net force on an object is found by...(same direction)

The net force of forces 15 N and 30 N is ______. (in the same direction)

For forces acting in opposite directions, the net force is found by

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