500 Best Applied Mechanics MCQ
Q97). A number of forces acting simultaneously on a particle of a body
a).may not be replaced by a single force
b).may be replaced by a single force
c).may be replaced by a single force through C.G. of the body
d).may be replaced by a couple
Correct Answer:
may be replaced by a single force
Explanation:
Q98). The force acting on a point on the surface of a rigid body may be considered to act
a).at the centre of gravity of the body
b).on the periphery of the body
c).on any point on the line of action of the force
d).at any point on the surface normal to the line of action of the force.
Correct Answer:
on any point on the line of action of the force
Explanation:
Q99). A satellite is said to move in a synchronous orbit if it moves at an altitude of 36, 000 km with a maximum velocity of about
a).7000 km per hour
b).8000 km per hour
c).9000 km per hour
d).11, 000 per hour
Correct Answer:
11, 000 per hour
Explanation:
Q100). Pick up the incorrect statement from the following :
a).The C.G. of a circle is at its centre
b).The C.G. of a triangle is at the intersecton of its medians
c).The C.G. of a rectangle is at the intersection of its diagonals
d).The C.G. of a semicircle is at a distance of /2 from the centre
Correct Answer:
The C.G. of a semicircle is at a distance of /2 from the centre
Explanation:
Q101). A 49 kg lady stands on a spring scale in an elevator. During the first 5 sec, starting from rest, the scale reads 69 kg. The velocity of the elevator will be
a).10 m/sec
b).15 m/sec
c).20 m/sec
d).25 m/sec.
Correct Answer:
20 m/sec
Explanation:
Q102). Pick up the correct statement from the following. A rubber ball when strikes a wall rebounds but a lead ball of same mass and velocity when strikes the same wall, falls down
a).rubber and lead balls undergo equal changes in momentum
b).change in momentum suffered by lead ball is less that of rubber ball
c).momentum of rubber ball is less than that of lead ball
d).none of these.
Correct Answer:
none of these.
Explanation:
Q103). The instantaneous centre of a member lies at the point of intersection of two lines drawn at the ends of the member such that the lines are inclined to the direction of motion of the ends at
a).30°
b).45°
c).60°
d).90°
Correct Answer:
90°
Explanation:
Q104). A retarding force on a body does not
a).change the motion of the body
b).retard the motion of the body
c).introduce the motion of the body
d).none of these.
Correct Answer:
retard the motion of the body
Explanation: