Mechanics - Newton's Laws of Motion (Module 8)

Question 1

Define Newton’s First Law

Answer 1

Objects either stay at rest or move with constant velocity unless acted on by a resultant force.

Question 2

Define Newton’s Second Law

Answer 2

Force is equal to to the change in momentum ( mV ) per change in time. For a constant mass therefore, force equals mass x acceleration. ( F=ma )

Question 3

Define Newton’s Third Law

Answer 3

When two objects interact they exert equal and opposite forces.

Question 4

What Is Thinking Distance, Braking Distance and Stopping Distance?

Answer 4

Thinking Distance = The distance the vehicle travels in the time it takes the driver to react.
Braking Distance = The distance the vehicle travels in the time it takes to stop safely, from when the brakes are applied.
Stopping Distance = Thinking distance + the braking distance.