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1361

A boat travels due east at a speed 40ms\(^{-1}\)s across a river flow due south at 30ms\(^{-1}\)s. What is the resultant speed of the boat?

  • A. 1.3ms-1
  • B. 10.0ms-1
  • C. 50.0ms-1
  • D. 70.0ms-1
View Answer & Discuss (11) JAMB 1994
1362
An object is projected with a velocity of 80ms-1 at an angle of 30o to the horizontal.The maximum height reached is
  • A. 20m
  • B. 80m
  • C. 160m
  • D. 320m
View Answer & Discuss (7) JAMB 1994
1363
A motor vehicle is brought to rest from a speed of 15ms-1 in 20 seconds. Calculate the retardation.
  • A. 0.75ms-1
  • B. 1.33ms-2
  • C. 5.00ms-2
  • D. 7.50ms-2
View Answer & Discuss (4) JAMB 1994
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1364

Which of the following is TRUE of a particle moving in a horizontal circle with constant angular velocity?

  • A. The energy is costant but the linear momentum varies
  • B. The linear momentum is conatant but the energy varies
  • C. both energy and linear momentum are constant
  • D. The speed and the linear velocity are both constant
View Answer & Discuss (15) JAMB 1994
1365
An object of mass 50kg is released from a height of 2m.Find the kinetic energy just before it strikes the ground
  • A. 250J
  • B. 1000J
  • C. 10 000J
  • D. 100 000J
View Answer & Discuss (8) JAMB 1994
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