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151.

The law of motion involved in the recoil of gun is

A.	Newton's first law of motion	B.	Newton's second law of motion
C.	Newton's third law of motion	D.	none of these

152.

If P is the force acting on the body, m is the mass of the body and a is the acceleration of the body, then according to Newton's second law of motion,

A.	P + m.a = 0	B.	P - m.a = 0
C.	P x m.a = 0	D.	P/m.a = 0

153.

The matter contained in a body, is called

A.	impulsive force	B.	mass
C.	weight	D.	momentum

154.

The force, by which the body is attracted, towards the centre of the earth, is called

A.	impulsive force	B.	mass
C.	weight	D.	momentum

155.

When a body falls freely under gravitational force, it possesses

A.	no	B.	minimum
C.	maximum

156.

The total motion possessed by a body, is called

A.	impulsive force	B.	mass
C.	weight	D.	momentum

157.

A newton is defined as the force while acting upon a mass of one kg, produces an acceleration of 1 m/s2 in the direction of which it acts.

Yes

158.

The force applied on a body of mass 100 kg to produce an acceleration of 5 m/s2, is

A.	20N	B.	100N
C.	500N	D.	none of these

159.

A lift moves downwards with an acceleration of 9.8 m/s2. The pressure exerted by a man on the floor of the lift is zero.

True

False

160.

When the lift is moving upwards with some acceleration, the pressure exerted by a man is

directly

inversely