1.5 Newton's First law

Question 1

What is the resultant force?

Answer 1

The single overall force that replaces multiple forces acting on a single object

Question 2

What is Newton’s first law?

Answer 2

A resultant force is needed to make something move

(I.e. force is needed to make something move)

Question 3

What happens if the resultant force on a stationary object is zero?

Answer 3

The object remains stationary

Question 4

What happens if the resultant force on a moving object is zero?

Answer 4

It continues moving at the same velocity

Question 5

If a car is travelling at constant velocity, what forces are acting in the opposite direction to the driving force?

Answer 5

Friction and air resistance

Question 6

What happens if there’s a non zero resultant force on the object?

Answer 6

Its velocity will change ( it will accelerate in the direction of the force)

Question 7

When a resultant force acts on an object, what five different things can happen?

Answer 7

1. Starts moving
2. Stops moving
3. Speeds up
4. Slows down
5. Changes direction