500 Best Applied Mechanics MCQ
Q41). A projectile is fired with a velocity of 100.3 m/sec. at an elevation of 60°. The velocity attained by the projectile when it is moving at a height of 100 m, is
a).70 m/sec.
b).75 m/sec.
c).80 m/sec.
d).90 m/sec.
Correct Answer:
0
Explanation:
Q42). A body is said to move with Simple Harmonic Motion if its acceleration, is
a).always directed away from the centre, the point of reference
b).proportional to the square of the distance from the point of reference
c).proportional to the distance from the point of reference and directed towards it
d).inversely proportion to the distance from the point of reference
Correct Answer:
proportional to the distance from the point of reference and directed towards it
Explanation:
Q43). One end of a light string 4 m in length is fixed to a point on a smooth wall and the other end fastened to a point on the surface of a smooth sphere of diameter 2.25 m and of weight 100 kg. The reaction between the sphere and the wall of the arrangement made is
a).102.5 kg
b).105.5 kg
c).108.5 kg
d).110 kg.
Correct Answer:
102.5 kg
Explanation:
Q44). Which one of the following laws is not applicable to a simple pendulum ?.
a).The time period does not depend on its magnitude
b).The time period is proportional to its length
c).The time period is proportional to where is length
d).The time period is inversely proportional to where is the acceleration due to gravity.
Correct Answer:
The time period is proportional to its length
Explanation:
Q45). Effect of a force on a body depends upon its
a).direction
b).magnitude
c).position
d).all the above.
Correct Answer:
all the above.
Explanation:
Q46). The resultant of the forces acting on a body will be zero if the body
a).rotates
b).moves with variable velocity in a straight line
c).moves along a curved path
d).does not move at all.
Correct Answer:
does not move at all.
Explanation:
Q47). A ball moving with a velocity of 5 m/sec impinges a fixed plane at an angle of 45° and its direction after impact is equally inclined to the line of impact. If the coefficient of restitution is 0.5, the velocity of the ball after impact will be
a).0.5 m/sec
b).1.5 m/sec
c).2.5 m/sec
d).3.5 m/sec
Correct Answer:
2.5 m/sec
Explanation:
Q48). A Seconds pendulum executes
a).0.5 beat per second
b).1.0 beat per second
c).2.0 beats per second
d).2.5 beats per second
Correct Answer:
2.0 beats per second
Explanation: