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231.

The tension T2 will be

A.	5 N	B.	15 N
C.	30 N	D.	60 N

232.

The torque of 50 Nm is applied on the wheel operating a valve. If the wheel is rotated through two revolutions, work done in Newton-metres is given by

A.	25	B.	100
C.	314	D.	628

233.

A ball A of mass 0.25 kg moving on a smooth horizontal table with a velocity of 10 m/s strikes an identical stationary ball B on the table. If the impact is perfectly elastic, the velocity of the ball B just after the impact will be

A.	5 m/s	B.	10 m/s
C.	zero	D.	2.5 m/s

234.

A force of 100 Newtons acts for 0.5 seconds on a body of mass 20 kg which is initially at rest. The velocity attained by the body is

A.	5 m/s	B.	2.5 m/s
C.	20 m/s	D.	0.5 m/s

235.

An automobile is travelling at 25 m/s. It takes 0.3 second to apply the brakes after which the deceleration is 6 m/s2. How far, in meters, does the automobile travel before it stops?

A.	40	B.	45
C.	50	D.	60

236.

A projectile is shot straight up with vo = 40 m/s. After how many seconds will it return if drag is neglected?

A.	4	B.	6
C.	8	D.	10

237.

A roller coaster reaches a velocity of 20 m/s at a location where the radius of curvature is 40 m. Calculate the acceleration in m/s2?

A.	8	B.	9
C.	10	D.	11

238.

Let the only force acting on two bodies be their mutual interactions. If both bodies start from rest, the distances travelled by each will be a

A.	proportional to the respective masses of the bodies	B.	inversely proportional to the respective masses of the bodies
C.	inversely proportional to the square of the respective masses of the bodies	D.	directly proportional to the square of the respective masses of the bodies

239.

The springs A and B are identical except that A is stiffer than B, that is KA > kB. If both the springs are stretched by the same amount

A.	more work will be expended on A than B	B.	less work will be expended on A than B
C.	same work will be expended in both springs.

240.

A boy sitting in a rail road car throws a ball straight up into the air. The ball will fall back into his hands when the rail road car is

A.	moving at constant velocity	B.	accelerating forwardA block A is dropped down a smooth inclined plane, while another identical block B is released for free fall from the same height
C.	decelerating	D.	accelerating forward while going around a curve of radius equal to the maximum height attained by the ball