31. The dimensions of power are_______________?
A. M’L2T2
B. M’L’T3
C. M’L’r2
D. M’L-‘T*
✅ The correct answer is option B.
Applied Mechanics and Graphic Statics MCQs
32. The resultant of two forces P and Q is R. If Q is doubled, the new resultant is perpendicular to P. Then_________________?
A. P = R
B. Q = R
C. P = Q
D. None of the above is correct
✅ The correct answer is option B.
33. One end of an elastic string of natural length / and modulus X is kept fixed while to the other end is attached a particle of mass m which is hanging freely under gravity. The particle is pulled down vertically through a distance x, held at rest and then released. The motion is___________________?
A. a simple harmonic motion
B. a rectilinear motion with constant speed
C. a damped oscillatory motion
D. none of the above
✅ The correct answer is option A.
34. If the direction of projection bisects the angle between the vertical and the inclined plane, then the range of projectile on the inclined plane is__________________?
A. zero
B. maximum
C. minimum
D. unpredictable
✅ The correct answer is option B.
35. Instantaneous center is at infinity when the angular velocity is _________________?
A. constant
B. zero
C. maximum
D. minimum
✅ The correct answer is option B.
36. A projectile has maximum range of 40 m on a horizontal plane. If angle of projection is a and the time of flight is 1 second, then sin a must be about__________________?
A. 1/4
B. 1/3
C. 1/2
D. 1/5
✅ The correct answer is option A.
37. Rate of change of angular momentum is equal to_______________?
A. force
B. torque
C. linear momentum
D. impulse
✅ The correct answer is option B.
38. The dimensions of Gravitational Universal constant ‘G’ are______________?
A. M-‘L2r2
B. M-‘L3r2
C. M-2L3T2
D. M’L3T2
✅ The correct answer is option B.
39. The graphical method of determining the forces in the members of a truss is based on________________?
A. method of joint
B. method of section
C. either method
D. none of the two methods
✅ The correct answer is option A.
40. 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
✅ The correct answer is option B.