A. 100 C.G.S. units
B. 10 C.G.S. units
C. 1000 C.G.S. units
D. 5000
C.G.S. units
62. A rope attached to a post in the ground is pulled
horizontally with a force of 80 kg. The pole pulls back with a force of
A. 1000 kg
B. 80 kg
C. 40 kg
D. 160 kg
63. We can clean a dirty carpet by beating. This is in
accordance with
A. Newton's
first law
B. Newton's second law
C. Newton's third law
D. None of the above
64. A force of 100 dynes acts on a body of 5 gms for 10
secs. What is the velocity produced?
A. 2 fr/sec
B. 20 fr/sec
C. 200
fr/sec
D. 2000 fr/sec
65. Swimming is possible because of which law of motion?
A. Second
B. First
C. Third
D. None of the above
66. A player caught a cricket ball of mass 150 gm. Moving
at a rate of 20m/s. If the catching process be completed in 0.1 s. The
force of the blow exerted by the ball on the hands is
A. 3000N
B. 300N
C. 30N
D. 30,000N
67. When a body is accelerated,
A. Its
velocity always changes
B. Its direction always changes
C. Its speed always changes
D. Its falls towards the earth
68. A force of 150 dynes acts on a mass of 50 gms for 5
seconds. What is the acceleration produced?
A. 4 cms/sec2
B. 9 cms/sec2
C. 10c cms/sec2
D. None of
these
69. The action and reaction forces referred in Newton's
third law of motion
A. Must act upon the same body
B. Must
act upon different bodies
C. Need not to be equal in
magnitude but must have the same line of action
D. Must be equal in magnitude bu tneed not have the same line of action
70. A force of 100 dynes acts on a body of 5 gms for 10
secs. Find the change in momentum.
A. 10 C.G.. Units
B. 100 C.G.. Units
C. 1000
C.G.. Units
D. 10000 C.G.. Units
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