Ch 3.4 - Acceleration (On the Move)

Question 1

An object whose speed is changing is said to accelerate (gain in speed).

Question 2

Acceleration tells us how fast the speed of something is changing.

Question 3

Acceleration tells us how much the speed changes in one second.

Question 4

(lots of sums to practise - go through notebook and test copy as well)

Question 5

Newton’s Three Laws of Motion
First Law -
Every object continues in its state of rest or uniform motion in a straight line unless a force acts on it to change its state.

Question 6

Third Law -
Forces always occur in pairs called action and reaction. To every action there is an equal and opposite reaction.

Question 7

Newton’s Second Law
What happens when a force acts on an object?

Answer 7

When a force acts on an object of constant mass, an acceleration results with the product of mass and acceleration equal to the applied force.