Newtons laws

Question 1

normal force

Answer 1

the force or the component of a force which a surface exerts on an object with which it is in contact, and which is perpendicular to the surface.

Question 2

frictional force

Answer 2

the force that opposes the motion of an object and which

acts parallel to the surface.

Question 3

static frictional force

Answer 3

the force that opposes the tendency of motion of a

stationary object relative to a surface.

Question 4

kinetic frictional force

Answer 4

as the force that opposes the motion of a moving object

relative to a surface.

Question 5

newton’s first law of motion

Answer 5

A body will remain in its state of rest or motion at

constant velocity unless a non-zero resultant/net force acts on it.

Question 6

newton’s second law of motion

Answer 6

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

Question 7

newton’s third law of motion

Answer 7

When object A exerts a force on object B, object B exerts a force of equal magnitude in the opposite direction of object A

Question 8

newton’s universal law of gravitation

Answer 8

Each body in the universe attracts every other body 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.

Question 10

weightlessness

Answer 10

weightlessness is the sensation experienced when all contact forces are removed i.e no external forces touch ones body