4. Dynamics

Question 1

Newton’s first law

Answer 1

Every object will continue at rest or uniform motion unless a resultant force acts on it

Question 2

Newton’s Second Law

Answer 2

When a resultant force acts on an object, it will accelerate in the direction of resultant force

Question 3

Newton’s Third Law

Answer 3

If body A exerts a force of Fc, body B will exert an equal and opposite force Fc on body B

Question 4

Positive impacts of friction

Answer 4

1. Walk without slipping
2. slow down cars when needed

Question 5

Negative impacts of friction

Answer 5

1. Cars are less effective
2. Moving parts in engines suffer wear and tear