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
Unit of momentum in S.I system is
gm x cm/sec
kg m/sec
sec/m/kg
kg/m
Applying force on the body by the magnet is called
Magnetic force
Mechanical force
Gravitational force
None of these
The resultant of action and reaction forces is _______.
Greater than zero
Less than zero
Zero
If a body is moving in a straight line path with a constant velocity, the force acting on it in the same direction increases its velocity. This force is called
Vector force
Decelerating force
Accelerating force
Applying a force on the body with physical contact and this force is called
A body whose momentum is constant must have constant
force
velocity
acceleration
All of these
The gravitational force of earth acting on a body of mass 1 kg is _______.
8.9 N
9.8 N
980 N
According to Newton’s second law of motion: Force, F =
ma
m / a
ma2
2ma2
Castor oil is used to reduce
Inertia
Frictional force
