A stone was thrown vertically upwards from the ground with a velocity of 50 m/sec. After 5 seconds another stone was thrown vertically upwards from the same place. If both the stones strike the ground at the same time, then the velocity with which the second stone was thrown should be (Assume g = 10 m/sec2)______________________?

A. 15 m/sec
B. 25 m/sec
C. 40 m/sec
D. 50 m/sec

A particle is dropped from a height of 3 m on a horizontal floor, which has a coefficient of restitution with the ball of 1/2. The height to which the ball will rebound after striking the floor is____________________?

A. 0.5 m
B. 0.75 m
C. 1.0 m
D. 1.5 m

One Joule is equivalent to________________?

A. 9.81 newton – metre
B. 1 newton – metre
C. 1 kg wt – metre
D. 1 dyne – metre

If a flywheel increases its speed from 10 rpm to 20 rpm in 10 seconds, then its angular acceleration is_____________________?

A. —rad/sec 10
B. —rad/sec 20
C. —rad/sec 30
D. None of the above

A car goes round a curve of radius 100 m at 25 m/sec. The angle to the horizontal at which the road must be banked to prevent sideways friction on the car wheels is tan”1 x, where x is (Assume g = 10 m/sec2)_____________________?

A. 3/8
B. 1/2
C. 9/5
D. 5/8

A body is dropped from a height of 100 m and at the same time another body is projected vertically upward with a velocity of 10 m/sec. The two particles will____________________?

A. Never meet
B. Meet after 1 sec
C. Meet after 5 sec
D. Meet after 10 sec

Two balls of masses 3 kg and 6 kg are moving with velocities of 4 m/sec and 1 m/sec respectively, towards each other along the line of their centers. After impact the 3 kg ball comes to rest. This can happen only if the coefficient of restitution between the balls is____________________?

A. 2/3
B. 1/5
C. 3/5
D. 1/3

The maximum pull in a cable, carrying a uniformly distributed load and supported at two ends which are at the same level, is at_____________________?

A. Supports
B. Quarter span
C. Mid span
D. None of the above

Minimum pull in a suspended cable with supports at two ends is equal to____________________?

A. Horizontal thrust
B. Support reactions
C. Resultant of horizontal thrust and support reaction
D. Half the weight of the cable

Cartesian form of the equation of catenary is_________________?

A. Y = c cosh x/c
B. Y = c sinh x/c
C. Y = c tan x/c
D. Y = c sin”1 x/c