U1.6 Newtons Laws Of Motion

Question 1

What is Newton’s first law of motion

Answer 1

If a body is at rest it will remain at rest, or if a body is moving it will continue to move in a straight line with a constant speed unless a resultant force acts on it.

Question 2

What is Newton’s second law

Answer 2

The acceleration of an object is inversely proportional to its mass, directly proportional to the resultant force on it and takes place in the same direction as the unbalanced force

Question 3

What is Newton’s third law

Answer 3

If body A exerts a force on body B, then body B exerts a force of the same size on body a but in the opposite direction

Question 4

What is friction

Answer 4

Friction is a force that always opposes motion and it takes place when two surfaces rub against each other. It always acts in the opposite direction of the motion

Question 5

What is tension

Answer 5

A force that exist when strings, chains or similar objects are stretched. It acts along the length of the object being stretched in the opposite direction to the pull

Question 6

What is normal contact force

Answer 6

The force that exists when two or more objects come into contact with one and other. This force acts at 90° to the surface of the object