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1

I. The earth is not spherical but elliptical in shape
II. Variation in latitude and longitude
III. Rotation of the earth on its axis
IV. Variation in the density of the earth

On which combination of the above does the weight of an object vary on the earth's surface?

  • A. I, II, III and IV
  • B. III and IV only
  • C. I, II and III only
  • D. I and II only
View Answer & Discuss (18) JAMB 2001
2

A body of mass 12kg traveling at 4.2ms-1 collides with a second body of mass 18kg at rest. Calculate their common velocity if the two bodies coalesce after collision?

  • A. 1.5 ms-1
  • B. 1.4 ms-1
  • C. 2.1 ms-1
  • D. 1.7 ms-1
View Answer & Discuss (6) JAMB 2009
3

The terminal velocity of a ball-bearing falling through a viscous fluid is reached when the?

  • A. upthrust is equal to the weight of the ball
  • B. ball accelerate uniformly
  • C. upthrust is equal to the velocity of the ball
  • D. velocity is uniform
View Answer & Discuss (10) JAMB 2009
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4

The driver in a motor car, of which the total mass is 800kg and which is traveling at 20ms-1, suddenly observes a stationary dog in his path 50m ahead. If the car brakes can exert a force of 2000N, what will most likely happen?

  • A. the car will be able to stop immediately the driver notices the dog
  • B. the car will stop 30m after hitting the dog
  • C. the car will stop 20m in front of the dog
  • D. the driver will quickly reverse the car
  • E. the car will stop 5m beyound the dog
View Answer & Discuss (10) JAMB 1981
5

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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