500 Best Applied Mechanics MCQ
Q17). The maximum velocity of a body vibrating with a simple harmonic motion of amplitude 150 mm and frequency 2 vibrations/sec, is
a).188.5 m/sec
b).18.85 m/sec
c).1.885 m/sec
d).0.18845 m/sec.
Correct Answer:
1.885 m/sec
Explanation:
Q18). The masses of two balls are in the ratio of 2 : 1 and their respective velocities are in the ratio of 1 : 2 but in opposite direction before impact. If the coefficient of restitution is 1/2, the velocities of separation of the balls will be equal to
a).original velocity in the same direction
b).half the original velocity in the same direction
c).half the original velocity in the opposite direction
d).original velocity in the opposite direction
Correct Answer:
original velocity in the opposite direction
Explanation:
Q19). The angle which an inclined surface makes with the horiontal when a body placed on it is on the point of moving down, is called
a).angle of repose
b).angle of friction
c).angle of inclination
d).none of these.
Correct Answer:
angle of repose
Explanation:
Q20). Work may be defined as
a).force x distance
b).force x velocity
c).force x acceleration
d).none of these.
Correct Answer:
force x distance
Explanation:
Q21). A bullet weighing 200 g is fired horizontally with a velocity of 25 m/sec from a gun carried on a carriage which together with the gun weighs 100 kg. The velocity of recoil of the gun, will be
a).0.01 m/sec
b).0.05 m/sec
c).1.00 m/sec
d).1.5 m/see.
Correct Answer:
0.05 m/sec
Explanation:
Q22). The tension in a cable supporting a lift
a).is more when the lift is moving downwards
b).is less when the lift is moving upwards
c).remains constant whether its moves downwards or upwards
d).is less when the lift is moving downwards.
Correct Answer:
is less when the lift is moving downwards.
Explanation:
Q23). A satellite moves in its orbit around the earth due to
a).Gravitational force
b).Centripetal force
c).Centrifugal force
d).none of these.
Correct Answer:
Centripetal force
Explanation:
Q24). If three rigid rods are hinged together to form a triangle and are given rotary as well as translatory motion, the number of instantaneous centres of the triangle, will be
a).1
b).2
c).3
d).4
Correct Answer:
3
Explanation: