A. Concave downwards
B. Convex up
C. Flat
D. None of the above
112. A piece of weighted wood just floats in water. When place3d in
alcohol (of lower density) it will.?
A. Float higher
B. Stay as before
C. Float lower
D. Sink
113. A force of 100 dynes acts for 10 seconds on a body of mass 500g.
What is the change in momentum.?
A. 10 C.G.S units
B. 100 C.G.S units
C. 1000 C.G.S units
D. 5000 C.G.S units
114. A 40kg cart moving at 3 m/s makes a head a head-on collision with a
20 kg cart at rest, as illustrated in Fig. 1.If the collision is completely
inelastic, the speed with winch the carts leave the impact is approximately.?
A. 6 m/s
B. 2 m/s
C. 20 m/s
D. 0.2 m/s
115. If the earth stopped rotating, the weight of objects at the equator
would.?
A. Be the same as before
B. Be less
C. Be greater
C. Very with latitude
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116. With the help of dimensions method it can be proved that
frequency of a stretched wire.?
A. Depends on the mass of the wire
B. Does not depend on the mass of the wire
C. Depends on the displacement of the wire
D. None of these
117. When a body undergoes an acceleration.?
A. Its velocity increases
B. A force acts upon it
C. Its speed increases
D. It falls toward the earth
118. A satellite travels in a circular orbit at a speed of 20,000 km/hr
to stay at a constant altitude. To escape from the earth, the speed would have to be
increased to.?
A. 40,000 km/hr
B. 28,000 km/hr
C. 21,000 km/hr
D. 64,000 km/hr
119. A projectile is fired at an angle of 37° with an initial speed of
100 m/s. What is the approximate versicle component of its velocity after 2s.?
A. 80 m/s
B. 40 m/s
C. 60 m/s
D. 100 m/s
120. The static friction is.?
A. Always greater than the dynamic friction
B. Always less than the dynamic friction
C. Equal to the dynamic friction
D. Sometimes greater and sometimes less
than the dynamic friction
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