Newton's Laws

Question 1

What is Newton’s Third Law?

Answer 1

Every action has an equal and opposite direction

Question 2

Explain why a cannon recoils when it fires a cannonball

Answer 2

When a cannonball is launched, it moves forwards, causing the cannon to go backwards. This is because the cannon and the cannonball exert opposite and equal force.

Question 3

What is Newton’s First Law?

Answer 3

An object’s motion will not change unless acted upon by an unbalanced force

Question 4

What is inertia?

Answer 4

The tendency of objects to continue in their state of motion

Question 5

Check Knowt in science folder for this question

Question 6

What is acceleration + units?

Answer 6

rate of change in velocity
units is m/s2

Question 7

acceleration formula

Answer 7

change in velocity/time

Question 8

Object A goes from rest to 10s forwards in 2 seconds. Calculate the acceleration.

Answer 8

Change in velocity is final speed - initial speed.
10-0=10
10/2=5
5m/s2

Question 9

Object B goes from 20s to rest in 5 seconds.
Calculate acceleration.

Answer 9

0-20=-20
-20/5=-4
-4m/s2 (or 4m/s2 of deceleration)