Forces Unit Test

Question 1

The amount of inertia on an object depends on its__________________

Answer 1

mass

Question 2

Friction is measured in what unit?

Answer 2

newtons (N)

Question 3

Two people are playing tug-of-war. They each pull with equal force. Are the forces balanced or unbalanced?

Answer 3

balanced

Question 4

The sum of all forces acting on an object is called the _________________ force.

Answer 4

net

Question 5

The same force is applied to a 0.5 kg baseball and a

7.3 kg bowling ball. Which will have the smaller acceleration?

Answer 5

bowling ball

Question 6

A car is moving in a straight line at 50 km/h. Is this an example of balanced or unbalanced force?

Answer 6

balanced

Question 7

If a car is traveling at 50 km/h and speeds up to 80 km/h, are the forces balanced or unbalanced

Answer 7

unbalanced

Question 8

A person in a head-on collision, who is not wearing a seatbelt, continues to move forward at the original speed of the car because of _______________.

Answer 8

inertia

Question 9

A feather will fall through the air more slowly than a brick because of ______________________.

Answer 9

air resistance

Question 10

A firefighter using a firehose feels the hose pushing back on him because__________

Answer 10

the water exerts an equal and opposite force on the hose

Question 11

What do we call the force that pulls all objects towards the Earth?

Answer 11

gravity

Question 12

What do we call the force of a compressed or stretched coil as it tries to return to its normal state?

Answer 12

spring

Question 13

What do we call a force that is transferred from a person or object to another object?

Answer 13

applied

Question 14

What do we call a force of attraction between positive and negative charges?

Answer 14

electrical

Question 15

What do we call the force that pushes objects up due to the fluid pressure of a liquid?

Answer 15

buoyant

Question 16

What do we call the force in strings, cables, ropes or wires when they are being pulled?

Answer 16

tension

Question 17

What do we call the force that is created when two surfaces rub against one another?

Answer 17

friction

Question 18

What do we call the force that pushes objects up when they are on a solid surface?

Answer 18

normal

Question 19

Which law of motion states that 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 19

Newton’s 1st Law of Motion

Question 20

Which law of motion states that for every action force, there is an equal and opposite reaction force?

Answer 20

Newton’s 3rd Law of Motion

Question 21

Which law of motion states that an object’s acceleration depends on its mass…and the net force acting on it?

Answer 21

Newton’s 2nd Law of Motion