Newtons Laws

Question 1

What did Isaac Newton discover?

Answer 1

Laws of motion

Question 2

What is Newton’s First Law?

Answer 2

A resultant force is needed to make something start moving, speed up or slow down

If the resultant force on a stationary object is zero the object will remain stationary. If the resultant force on a moving object is zero it will remain moving at the same velocity

Question 3

What is acceleration proportional to?

Answer 3

Resultant force

Question 4

What is Newton’s Second Law?

Answer 4

The acceleration of an object increases if the resultant force on it increases, and decreases if the mass of the object increases

Question 5

What is Newton’s Third Law?

Answer 5

When two objects interact, the fores they exert on each other is equal and opposite directions
(e.g. you push a shopping trolley and the trolley pushes back against you)

Question 6

Practical to Investigate Newtons 2nd Law (mass)

Answer 6

To investigate the effect of mass, add mass to the trolley one at a time to increase the mass of the system (not the mass of the trolley) Record the average acceleration for each of the masses

Question 7

Practical to Investigate Newtons 2nd Law (force)

Answer 7

Keep the mass of the system the same but change the mass of the hook. Record average acceleration for each force