Top 350+ Solved Applied Mechanics MCQ Questions Answer
Q. Three forces A, B and C of magnitudes 8 N, 12 N and 20 N acting on a particle are in equilibrim. It can be concluded that
a. 107 dynes
b. B and C act in opposite directions
c. one of the forces in non-coplaner
d. A and B act at 90?
e. one of the forces is non-concurrent
Q. A cylindrical bar 10 metres long elongates 0.1 mm under a load. The strain in the material of the bar will be
a. 10--4
b. 10--5
c. 10--7
d. All of the above
Q. The limiting force of fiction is
a. The friction force acting on a body when it is in motion
b. The value of friction force which stops the movement of the body
c. The value of friction force which cannot exceed under a situation
d. The friction force acting when the body is just about to move
e. Double of the normal friction
Q. If a solid sphere rolls on a horizontal surface, then the ratio of its rotational kinetic energy to its total kinetic energy is
a. 1 ; 7
b. 3 ; 7
c. 107 dynes
d. 4 ; 7
e. 2 ; 7
Q. Which of the following is scalar quantity
a. Area of triangle
b. Displacement of a particle
c. Acceleration of car
d. Force of friction
e. Velocity a gear
Q. The gravitational field at the surface of the moon is one sixth of that at the surface of the earth. A 72 kg man weighs on the surface of the moon
a. 137.7 N
b. 250
c. 72 N
d. 420 N
e. 117.7 N
Q. If three non-parallel forces hold a rigid body in equilibrium, they must
a. be non-coneurrent
b. be colinear
c. 107 dynes
d. be equal in magnitude
e. be concurrent
Q. A stone dropped from a baloon that was ascending at the rate of 30 ft/sec, reaches ground after 10 secs. The height of the baloon where stone was dropped was
a. 3420 ft
b. 107 dynes
c. 4520 ft
d. 2310 ft
e. 1310 ft
Q. A force F = 2i + 3j - k is passing through the origin. Its moment about point (1, 1, 0) is
a. 107 dynes
b. i + j + k
c. 2i + 3j
d. zero
e. i - j - k
Q. An iron sphere of mass 30 kg and an aluminium sphere of mass 10 kg, both having the same diameter are dropped vertically from a cliff. When they are 10 metrs from the ground, they have identical
a. Accelerations
b. Momenta
c. Kinetic energies
d. Potential energies
e. All of the above
Q. For perfectly elastic bodies the value of the coefficient of restitution is
a. 0.707
b. 0.5
c. 1
d. 0.25
e. Zero
Q. A satellite launch station should be
a. 107 dynes
b. near the equatorial region
c. all the locations are equally good
d. one the polar axis
e. near the polar region
Q. The direction of projection for the range of a projectile to be maximum on an inclined plane having angle of inclination 30? to the horizontal, whould be
a. 45? with horizontal
b. 30? with vertical
c. 30? with horizontal
d. 60? with inclined plane
e. 45? with inclined plane
Q. If for power transmission a gear train consisting of 8 gears is used, then
a. the motion of driver and follower will be in the same direction
b. the motion of driver and follower will be in the opposite directions
c. either of (A) or (B) above
d. None of the above
e. 107 dynes
Q. A train travels between two stations 15 km, apart in 18 minutes. If the train accelerates for a part of journey uniformly followed by uniform relardation, the maximum speed attained by the train, during, the journey, will be
a. 60 km/hr
b. 80 km/hr
c. 125 km/hr
d. 100 km/hr
e. 107 dynes