Quiz about Unit 07: Forces Test Review

Question 1

What is a force?

Accepted Answer

Any push or pull on an object

Answer

Any grab or tug on a object

Answer

Any rest or motion of an object

Answer

Any fall or raise or an object

Question 2

What tool do we use to measure forces?

Accepted Answer

Spring scale

Answer

Balance

Answer

Meterstick

Answer

Our hands

Question 3

Which of the following is the correct force diagram of a box being pushed across a rough surface

Accepted Answer

Option D is correct

Answer

A.

Answer

B.

Answer

C.

Question 4

The total amount of force acting on an object, including direction is the:

Accepted Answer

Net force

Answer

Contact force

Answer

Balanced force

Answer

Unbalanced force

Question 5

Balanced or unbalanced?

Accepted Answer

Unbalanced

Answer

Balanced

Question 6

Name the missing force...

Accepted Answer

Normal Force

Answer

Weight Force

Answer

Friction Force

Answer

Air Resistance

Question 7

Newton's 1st Law states

Accepted Answer

An object at rest will stay at rest and an object in motion will stay in motion unless acted upon by an unbalanced force

Answer

There are always unbalanced forces acting on objects, so objects always have a net force greater than zero

Answer

A net force acting on an object causes the object to accelerate in the direction of the net force

Answer

For every force (action) there is an equal and opposite force (reaction)

Question 8

Newton's 2nd Law states

Accepted Answer

A net force acting on an object causes the object to accelerate in the direction of the net force

Answer

There are always unbalanced forces acting on objects, so objects always have a net force greater than zero

Answer

An object at rest will stay at rest and an object in motion will stay in motion unless acted upon by an unbalanced force

Answer

For every force (action) there is an equal and opposite force (reaction)

Question 9

Newton's 3rd Law states

Accepted Answer

For every force (action) there is an equal and opposite force (reaction)

Answer

There are always unbalanced forces acting on objects, so objects always have a net force greater than zero

Answer

An object at rest will stay at rest and an object in motion will stay in motion unless acted upon by an unbalanced force

Answer

A net force acting on an object causes the object to accelerate in the direction of the net force

Question 10

A group of kids plays tug of war. One pulls to right the with 10 N of force. Another kid pulls right with 13 N of force. The last kid pulls to the left with 25 N of force. What is the net force on the rope?

Accepted Answer

-2 N

Answer

48N

Answer

2 N

Answer

-28 N

Question 11

Two students are pulling a heavy box down the hallway. If student 1 pulls with 5 N and student 2 pulls with 16 N, what is the net force on the box?

Accepted Answer

21 N

Answer

5 N

Answer

16 N

Answer

11 N

Question 12

Will it take more force to push an empty shopping cart or a shopping cart that is full?

Accepted Answer

Full

Answer

It will take the same for both

Answer

Empty

Question 13

Weight is the same as what force?

Accepted Answer

Gravity

Answer

Friction

Answer

Tension

Answer

Applied

Question 14

Normal force is always equal to what other force?

Accepted Answer

Gravity force

Answer

Friction Force

Answer

Net Force

Answer

Tension Force

Question 15

If forces are balanced, what is the net force?

Accepted Answer

O N

Answer

Impossible to know without numbers

Answer

Always positive

Answer

Always negative

Question 16

A car is driving down the road. What kind of friction is present?

Accepted Answer

Rolling Friction

Answer

Static Friction

Answer

Sliding Friction

Question 17

A box is being pushed across the floor. What kind of friction is present?

Accepted Answer

Sliding Friction

Answer

Static Friction

Answer

Rolling Friction

Question 18

A boy is trying to push a heavy boulder but it won't move What kind of friction is present?

Accepted Answer

Static Friction

Answer

Sliding Friction

Answer

Rolling Friction

Question 19

A 0.5 kg apple sits on a countertop. What is the normal force acting on the apple?

Accepted Answer

4.9 N

Answer

0.5 N

Answer

9.8 N

Answer

19.6 N

Question 20

If there is 20 N of frictional force between a ball and the floor. The ball has a normal force of 10 N, what is the coefficient of friction?

Accepted Answer

2

Answer

10

Answer

0.5

Answer

200

Question 21

If a wagon has a mass of 8 kg and it is accelerating at 0.5 m/s2, what is the force pulling on the wagon?

Accepted Answer

4 N

Answer

16 N

Answer

8 N

Answer

0.06 N

Question 22

A cart has a normal force of 15 N. If the cart is rolled down a hallway with a coefficient of friction of 0.1, what is the frictional force between the cart and the hallway?

Accepted Answer

1.5 N

Answer

15 N

Answer

150 N

Answer

.15 N

Question 23

A heavy box is pushed with 15 N of force. If there is 7 N of friction between the box and the floor, what is the net force on the box?

Accepted Answer

8 N

Answer

15 N

Answer

7 N

Answer

22 N

Question 24

What is the normal force of a box that is sliding with a coefficient of friction of 0.8 and has a frictional force of 60 N?

Accepted Answer

75 N

Answer

48 N

Answer

60 N

Answer

7.8 N

Question 25

If a horse has a weight of 80 N, what is the normal force acting on the horse?

Accepted Answer

80 N

Answer

8.16 N

Answer

784 N

Answer

0.12 N

Question 26

If a 0.25 kg egg is falling through the air, what is the force due to gravity pulling it down?

Accepted Answer

2.45 N

Answer

9.8 N

Answer

0.25 N

Answer

39.2 N

Question 27

A group of students is playing tug of war. Jake pulls right with 13 N of force. Irvin also pulls right, but with only 7 N of force. Gary is on the opposite side of them. Gary can pull with 16 N of force. Ellie helps Gary and pulls with 5 N of force. What is the net force and are the forces balanced or unbalanced?

Accepted Answer

-1 N, Unbalanced

Answer

1 N, Balanced

Answer

1 N, Unbalanced

Answer

O N, Balanced

Unit 07: Forces Test Review

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