B-Newton's Laws And Application Of Newton's Laws

Question 1

Define weight (Fg)

Answer 1

The gravitational force the earth exerts on any object on or near its surface

Question 2

Define normal force (Fn)

Answer 2

The perpendicular force exerted by a surface on an object in contact with it

Question 3

Define frictional force due to a surface(Ff)

Answer 3

The force that opposes the motion of an object and acts parallel to the surface with which the object is in contact

Question 4

State Newton’s first law

Answer 4

An object continues in a state of rest or moving with a constant velocity unless it is acted upon by a net or resultant force

Question 5

Define inertia

Answer 5

The property of an object that causes it to resist a change in its state of rest or uniform motion

Question 6

State Newton’s second law

Answer 6

When a net force, Fnet, is applied to an object of mass m, it accelerates in the direction of the net force. The acceleration ,a, is directly proportional to the net force and inversely proportional to the mass

Question 7

State Newton’s third law

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