Physics
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The centre of mass of system of particles does not depend on:
Answer: B. Force on the particles The centre of mass of system of particles does not depend on force on the particles.
Answer: B. Force on the particles
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A motor cyclist going round in a circular track at a constant speed has:
Answer: C. Acceleration with constant magnitude with its direction changing A motor cyclist going round in a circular track at a constant speed has acceleration with constant magnitude with its direction changing.
Answer: C. Acceleration with constant magnitude with its direction changing
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To move a body in a circle, which of the following force is needed:
Answer: C. Centripetal To move a body in a circle, centripetal force is needed.
Answer: C. Centripetal
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The centre of gravity and centre of mass of bodies coincide:
Answer: B. May be The centre of gravity and centre of mass of body may be coincide.
Answer: B. May be
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When mass and speed are doubled, the kinetic energy increase:
Answer: C. 8 times When mass and speed are doubled, the kinetic energy increase 8 times.
Answer: C. 8 times
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A force acts on a body in the direction of motion. The kinetic energy of body will:
Answer: A. Increase A force acts on a body in the direction of motion. The kinetic energy of body will be increase.
Answer: A. Increase
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If a shell fired from a cannon explodes in mid air, then
Answer: C. Its total kinetic energy increase If a shell fired from a cannon explodes in mid air, then its total kinetic energy increase.
Answer: C. Its total kinetic energy increase
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A light and a heavy body have equal kinetic energy. Which has greater momentum:
Answer: A. The heavy body A light and a heavy body have equal kinetic energy. The heavy body has greater momentum.
Answer: A. The heavy body
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A light and a heavy body have equal momentum. Which one will have greater kinetic energy:
Answer: A. The light body A light and a heavy body have equal momentum. The light body will have greater kinetic energy.
Answer: A. The light body
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The bob of an oscillating simple pendulum comes to rest after some time due to:
Answer: C. Friction of air The bob of an oscillating simple pendulum comes to rest after some time due to friction of air.
Answer: C. Friction of air
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