Related InterviewSolutions

• Each of the two guns, mounted on a rotating platform with their lengths parallel to each other, fires 20 bullets per second at a speed of 50 m `s^(-1)`. If the perpendicular distance between the two guns is 1.2 m and the mass of each bullet is 25g, find the couple acting on the platform.
• Two wheel and axle systems P and Q are connected as shown in the figure. The radii of wheels and axles of P and Q are 20 cm, 27 cm, 3 cm and 5 cm, respectively. If L = 540 kgwt, find E.
• Gears are used in vehicles to transmit motion and power.
• Find the ratio of efforts required to raise a given load, when the angle of inclination of a given plank is changed from `60^(@)` to `30^(@)`. Also find the percentage change in the mechanical advantage.
• The efficiency of a machine is 50% . If 300 J of energy is given to the machine, its output is ________.A. 150 ergB. 350 JC. 250 JD. 150 J
• An effort of 35 N is applied on a machine having mechanical advantage 6. The load that is lifted using the effort is ______ N.A. 210B. 41C. 6D. 29
• The pitch of a screw in a screw jack A is half that of another screw jack B. for 10 complete rotations of the lever, which one of the jack will lift a car more higher? Which one need more effort to do an equal work if both the jacks have livers of equal length?
• How can we obtain the resting point-indicating equilibrium, even with unequal masses in the two pans of a physical balance?
• The ratio of load to displacement of the rider from its zero mark in a Roman steel yard is 20 gf:1 cm. If the rider is displaced by 20 cm from its zero mark, the load attached to the steel yard is ________.A. 40 gfB. 4 kgfC. 400 gfD. 0.04 kgf