Newton’s Laws

Question 1

Normal Force

Answer 1

The force which a surface exerts on an object that is in contact with it, and is perpendicular to the surface

Question 2

Frictional force

Answer 2

Force that opposes the motion of an object and act’s parallel to the surface the object is in contact with

Question 3

Static frictional force

Answer 3

Frictional force that opposes the tendency of motion of a stationary object relative to the surface

Question 4

Kinetic frictional force

Answer 4

Frictional force that opposes the motion of a moving object relative to the surface

Question 5

Newtons first law of motion

Answer 5

An object will continue in a state of rest or uniform motion unless it is acted upon by a net external force

Question 6

Newtons second law of motion

Answer 6

When a net force is applied to an object of mass, M, the object will accelerate in the direction of the net force. The acceleration, a, is directly proportional to the net force and inversely proportional to the mass of the object.

Question 7

Newtons third law of motion

Answer 7

When object A exerts a force on object B, object B simultaneously exerts an oppositely directed force of equal magnitude on object A

Question 8

Newtons law of universal gravitation

Answer 8

Every object in the universe attracts every other object with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centres

Question 9

weight

Answer 9

the gravitational force the Earth exerts on any object on or near its surface.