NEWTON'S LAW

Question 1

Define 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

define 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

frictional force:
Is proportional to the

Answer 5

normal force

Question 6

frictional force is Is independent

Answer 6

the area of contact
&
the velocity of motion

Question 7

State Newton’s first law of motion:

Answer 7

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 8

Newton’s second law of motion:

Answer 8

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

Question 9

State Newton’s third law of motion

Answer 9

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

Question 10

State Newton’s Law of Universal Gravitation:

Answer 10

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 11

weight

Answer 11

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