Unit 1 - Forces, Energy & Power

Question 1

What is Newton’s second law?

Answer 1

F = ma

Question 2

What is Newton’s third law?

Answer 2

If object A exerts a force on object B then object B will exert an equal but opposite force on object A

Question 3

Lighter or heavier when accelerating down in a lift?

Answer 3

Lighter

Question 4

Lighter or heavier when decelerating down in a lift?

Answer 4

Heavier

Question 5

Lighter or heavier when accelerating up in a lift?

Answer 5

Heavier

Question 6

Lighter or heavier when decelerating up in a lift?

Answer 6

Lighter

Question 7

What is the formula for weight acting parallel to a slope?

Answer 7

W = m g sin(x)

Question 8

What is the law of conservation of energy?

Answer 8

Energy cannot be created or destroyed, only converted from one form to the other

Question 9

What is power a measure of?

Answer 9

The rate at which energy is converted

Question 10

What is Newton’s first law?

Answer 10

An object will remain at rest or travel in a straight line at a constant speed if the forces are balanced