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Engineering :: Applied Mechanics


21.  A body in Simple Harmonic Motion will attain maximum velocity when it passes through
A. Extreme point of the oscillation of L.H.S. B. Extreme point of the oscillation at R.H.S.
C. Mean position D. Point of half amplitude
E. Point of 0.75 amplitude    

22.  The maximum velocity of a body in SHM with amplitude of 150 mm and a frequency 2 vibrations/sec is equal to
A. 0.01885 m/sec B. 0.1885 m/sec
C. 1.885 m/sec D. 18.55 m/sec
E. 185.5 m/sec    

23.  For the maximum range of a projectile the angle of projection should be
A. 22 B. 30?
C. 45? D. 15?
E. 90?    

24.  A train moving at 60 kilometers per hour is struck by a bullet moving 1000 m/sec at right angles to the train. The direction with which the bullet appears to strike the train would be
A. 22 B. 30?
C. 45? D. 60?
E. 75?    

25.  In actual machines
A. Mechanical advantage is equal to velocity ratio B. Mechanical advantage is greater than velocity ratio
C. Mechanical advantage is less than velocity ratio D. Mechanical advantage is unity
E. Mechanical advantage is less than unity    

26.  A stone is thrown up from the foot of tower 50 m high with a velocity of 25 m/sec and at the same time another stone is dropped from the top of tower, the two stones will cross each other after
A. 2 sec B. 3 sec
C. 4 sec D. 4.5 sec
E. 5 sec    

27.  A particle starts from rest and moves in a straight line whose equation of motion is given by S = 2t3 - t2 - 1. The acceleration of the particle after one sec will be
A. 4 m/sec2 B. 6 m/sec2
C. 8 m/sec2 D. 10 m/sec2
E. 12 m/sec2    

28.  The statement ---- if three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two ---- is known as
A. Law of triangle of forces B. Lami's theorem
C. D'Alembert's principle D. Law of polygon of forces
E. Newtons law of forces    

29.  The centre of gravity of a plane lamina will not be at its geometrical centre if it is a
A. Square B. Rectangle
C. Right angled triangle D. Equilateral triangle
E. Circle    

30.  According to the principle of transmissibility of forces, when a force acts upon a body ; its effect is
A. Minimum when it acts at C.G. of the body B. Maximum when it acts at C.G. of the body
C. Different at different points of body D. Same at every point in its line of action
E. None of the above    




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