When a bus or train stops suddenly, a person siting inside tends to fall forward, due to
Inertia of rest
Inertia of motion
Inertia of direction
All the above
The force applied by us on a wall is called
Reaction
Action
Momentum
None of these
The acceleration of a body is directly proportional to the force acting on it and inversely proportional to its mass and takes place in the same direction of force. It is the
First law of motion
Second law of motion
Third law of motion
If two surfaces in contact with one another have relative motion between them , it is opposed by a force called
Frictional force
Mechanical force
Gravitational force
According to Newton’s second law of motion: Force, F =
ma
m / a
ma2
2ma2
A body whose momentum is constant must have constant
force
velocity
acceleration
All of these
Weight of the body is the earth’s __________ acting on the body.
Friction force
Attractive force
Electrical force
Units of momentum in C.G.S system is
gm x cm/sec
kg/m/sec
gm x sec/cm
none of these
According to Newton’s third law; Action =
-Reaction
+Reaction
Zero
Everybody continues in its state of rest or of uniform motion in a straight line unless acted upon by an external force to change its state. It is the
Newton's First law of motion
Newton's Law of Gravitation
Newton's Third law of motion
Newton's Second law of motion
