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681
A rocket is fired from the earth's surface to a distant planet. By Newton's law of universal gravitation, the force F will
  • A. increase as r reduces
  • B. increase as G varies
  • C. remains constant
  • D. increases as r increases
View Answer & Discuss (2) JAMB 2012
682
If a freely suspended object is pulled to one side and released, it oscillates about the point of suspension because the
  • A. acceleration is directly proportional to the displacement
  • B. motion is directed away from the equilibrium point
  • C. acceleration is directly proportional to the square of the displacement
  • D. velocity is minimum at the equilibrium ponit
View Answer & Discuss (5) JAMB 2012
683
An object moves in a circular path of radius 0.5m with a speed of 1ms-1 What is its angular velocity?
  • A. 8 rads-1
  • B. 4 rads-1
  • C. 2 rads-1
  • D. 1 rads-1
View Answer & Discuss (2) JAMB 2012
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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684
An object of mass 20kg slides down an inclined plane at an angle of 30o to the horizontal. The coefficient of static friction is?
[g = 10ms-2]
  • A. 0.2
  • B. 0.3
  • C. 0.5
  • D. 0.6
View Answer & Discuss (20) JAMB 2012
685

A block and tackle is used to raise a load of 250N through a vertical distance of 30m. What is the efficiency of the system if the work done against friction is 1500J?

  • A. 62.5%
  • B. 73.3%
  • C. 83.3%
  • D. 94.3%
View Answer & Discuss (3) JAMB 2012
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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