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Physics 1988 WAEC Past Questions

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6

A body is projected into space with an initial velocity V0 at an angle, θ to the horizontal. Which of the following statements is/are correct about its motion?
I. The total time of flight is (V0 Cosθ)/g.
II. The maximum height is (V0 Sin 2θ)/2g.
III. The range is (V02 Cos2θ)/g.

  • A. I & II only
  • B. I & III only
  • C. II & III only
  • D. II only
  • E. III only
View Answer & Discuss (17) WAEC 1988
7

A catapult is used to project a stone. Which of the following energy conversions takes place as the stone is released?

  • A. The kinetic energy of the stone is converted into gravitational potential energy
  • B. The gravitational potential energy of the catapult is converted into kinetic energy of the stone
  • C. The gravitational potential energy is converted into elastic potential energy
  • D. The elastic potential energy of the catapult is converted into gravitational potential energy of the stone
  • E. None of the above
View Answer & Discuss (23) WAEC 1988
8
A ball is thrown vertically upwards from the ground with an initial velocity of 50ms-1. What is the total time spent by the ball in the air? (g = 10ms-2)
  • A. 2.5s
  • B. 5.0s
  • C. 10.0s
  • D. 15.0s
  • E. 20.0s
View Answer & Discuss (19) WAEC 1988
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9
Which of the following correctly gives the relationship between linear speed V and angular speed ω of a body moving uniformly in a circle of radius r?
  • A. V = ωr
  • B. V = ω2r
  • C. V = ωr2
  • D. V2 = ωr
  • E. V = ω/r
View Answer & Discuss (4) WAEC 1988
10
The motion of a body is simple harmonic if the
  • A. Acceleration is always directed towards a fixed point
  • B. path of motion is a striaght line
  • C. Acceleration is directed towards a fixed point and proportional to its distance from the point
  • D. Acceleration is proportional to the square of the distance from a fixed point
  • E. Acceleration is constant and directed towards a fixed point
View Answer & Discuss (1) WAEC 1988
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