Physics Review: Newton’s Laws & Energy

Question 1

What is the SI unit of force?

Accepted Answer

Newton

Question 2

What is Newton’s First Law also known as?

Accepted Answer

Law of Inertia

Question 3

What happens when the net force on an object is zero?

Accepted Answer

The object moves at constant velocity.

Question 4

A 2 kg object moves at a speed of 6 m/s. What is its kinetic energy?

Accepted Answer

36 J

Question 5

A 4 kg object moves with a speed of 8 m/s. What is its kinetic energy?

Accepted Answer

128 J

Question 6

Which force is responsible for holding an object on a surface without motion?

Accepted Answer

Normal force

Question 7

Newton’s Second Law states that force is equal to...

Accepted Answer

Mass times acceleration

Question 8

A 10 kg object experiences a force of 60 N. What is its acceleration?

Accepted Answer

6 m/s^2

Question 9

Which of the following is a field force?

Accepted Answer

Gravity

Question 10

Which frictional force is usually greater?

Accepted Answer

Static friction

Question 11

What is the gravitational potential energy of a 15 kg object at a height of 3 m?

Accepted Answer

450 J

Questions 11