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Physics 2008 WAEC Past Questions

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11
The mass attached to a string is moving in a circular path. If the speed is doubled, the tension in the string will be
  • A. doubled
  • B. halved
  • C. four times as great
  • D. one-fourth as much
View Answer & Discuss (5) WAEC 2008
12
An object of mass 2kg moving with a velocity 3ms-11 collides head-on with another object of mass 1kg moving in the opposite direction with a velocity of 4ms-1. If the objects stick together after collision, calculate their common speed.
  • A. 0.60ms-1
  • B. 0.67ms-1
  • C. 2.00ms-1
  • D. 3.33-1
View Answer & Discuss (2) WAEC 2008
13

A ball is dropped and it hits the floor at a point A. It rebounds upward to a point B. While moving from A to B its?

  • A. kinetic energy is increasing
  • B. potential energy is increasing
  • C. potential energy is decreasing
  • D. kinetic energy remains constant
View Answer & Discuss (8) WAEC 2008
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14
Which of the following devices convert heat energy to electrical energy?
  • A. transformer
  • B. dynamo
  • C. thermocouple
  • D. thermostat
View Answer & Discuss WAEC 2008
15
An object of mass 0.25kg moves at a height h above the ground with a speed of 4ms-1, if its mechanical energy at this height is 12 J, determine the value of h. [g = 10ms-1]
  • A. 0.8m
  • B. 4.0m
  • C. 4.8m
  • D. 5.6m
View Answer & Discuss (4) WAEC 2008
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