311. One newton-meter-second is equal to:
A. Joule
B. Joule-second
C. Joule-meter
D. Kgm²/s²
312. A 0.8 kg mass attached to the end of a 0.5 m long weightless rope is whirled in a circle with an angular speed of 10 rad/s. The precise energy of the mass is:
A. 2 J-S
B. 0.4 J-S
C. 0.2 J-S
D. 0.1 J-S
313. The angular momentum of a body changes from 30 J-S to 50 J-S in 0.5 sec. The Force following up on it is:
A. 400 N m
B. 500 N m
C. 100 N m
D. 150 N m
314. A Shearing stress that acts on a body affects its?
(A) Width
B) Shape
(C) Length
(D) Volume
315. According to Hooke’s law, the force needed to elongate an elastic body by an amount S is proportional to?
A) S
(B) 1/S²
(C) 1/S
(D) S²
316. The rotational analogue of force in linear motion is?
A) Torque
(B) Moment of Inertia
(C) Angular momentum
(D) Weight
317. A hole is drilled through the earth along a diameter, and a stone dropped into it. When the stone is at the center of the earth it has?
(A) Potential energy
B) Mass
(C) Weight
(D) Acceleration
318. In order to cause a moving body to pursue a circular path, it is necessary to apply?
(A) Centrifugal force
B) Centripetal force
(C) Gravitational force
(D) Internal force
319. A body in equilibrium may not have?
A) Acceleration
(B) Kinetic energy
(C) Velocity
(D) Momentum
320. A force of 3 N acts perpendicularly to a force of 4 N, their resultant has a magnitude of?
(A) 3 N
(B) 4 N
C) 5 N
(D) 10 N
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