231. What is the lightest metal?
A) Aluminium
(B) Lead
(C) Mercury
(D) Copper
232. The kinetic energy of a body of mass 2 kg is 25 Joule. Its speed will be?
A) 5 ms-1
B) 12.5 ms-1
C) 25 ms-1
D) 50 ms-1
233. GPS Global Positioning System consists of how many satellites?
(A) 20
(B)22
C) 24
(D) 26
234. Two equal but unlike parallel forces having different lines of action produce?
(A) Equilibrium
B) Couple
(C) Torque
(D) Neutral equilibrium
235. The motion of the body around its axis is called?
(A) Vibratory motion
(B) Random motion
C) Circular motion
(D) Rotatory motion
236. The least count of a meter rod is?
(A) 0.01 mm
(B) 0.1 mm
C) 1 mm
(D) 0.001 mm
236. At the top of the trajectory of a projectile, the acceleration is:
A. Maximum
B. Minimum
C. Zero
D. g
237. For keeping a body in circular motion, the force required is:
A. Centripetal
B. Centrifugal
C. Radial
D. Tangential
238. In a uniform circular motion of a particle, the direction changes but not its:
A. Angular displacement
B. Magnitude of velocity
C. Force towards the center
D. B and C
239. The quantity (mr^2) is known as:
A. Moment arm
B. Moment of inertia
C. Moment of force
D. None of these
240. If a force acts on a body, whose action line does not pass through its center of gravity, then the body will experience:
A. Angular acceleration
B. Linear acceleration
C. No acceleration
D. None of these
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