Physics Past Questions

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1
The inner diameter of a test tube can be measured accurately using a
  • A. micrometer screw guage
  • B. pair of dividers
  • C. metre rule
  • D. pair of vernier calipers
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2
Two bodies have masses in the ratio 3:1. They experience forces which impart to them acceleration in the ratio 2:9 respectively. Find the ratio of forces the masses experienced.
  • A. 1 : 4
  • B. 2 : 1
  • C. 2 : 3
  • D. 2 : 5
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3
Particles of mass 10-2kg is fixed to the tip of a fan blade which rotates with angular velocity of 100rad-1. If the radius of the blade is 0.2m, the centripetal force is
  • A. 2 N
  • B. 20 N
  • C. 200 N
  • D. 400 N
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4
a lead bullet of mass 0.05kg is fired with a velocity of 200ms-1 into a lead block of mass 0.95kg. Given that the lead block can move freely, the final kinetic energy after impact is
  • A. 50 J
  • B. 100 J
  • C. 150 J
  • D. 200 J
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5
A ball of mass 0.1kg is thrown vertically upwards with a speed of 10ms-1 from the top of a tower 10m high. Neglecting air resistance, its total energy just before hitting the ground is

(take g = 10ms-2)
  • A. 5 J
  • B. 10 J
  • C. 15 J
  • D. 20 J
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