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681

A plane inclined at an angle at 30o to the horizontal has an efficiency of 50%. The force parallel to the plane required to push a load of 120 N uniformly up the plane is

  • A. 40√3N
  • B. 60N
  • C. 120N
  • D. 200N
  • E. 240N
View Answer & Discuss (4) WAEC 1990
682
The diagram above represents a portion of a micrometer screw 20 gauge. What is its reading?
  • A. 3.70mm
  • B. 3.67mm
  • C. 3.50mm
  • D. 3.33mm
  • E. 3.17mm
View Answer & Discuss (9) WAEC 1990
683
A girl whose mass is 55kg stands on a spring - weighing machine inside a lift. When the lift starts to ascend, its acceleration is 2ms1. What will be the reading on the machine? (Take g = ms-2)
  • A. 66 kg
  • B. 55 kg
  • C. 44 kg
  • D. 22 kg
  • E. 11 kg
View Answer & Discuss (5) WAEC 1990
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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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684
Two forces each of 4 N act on the opposite sides of a rectangular plate as shown in the diagram above. Calculate the magnitude of g the couple acting on the plate.
  • A. 6.4 Nm
  • B. 3.2 Nm
  • C. 1.6 Nm
  • D. 0.8 Nm
  • E. 0.0 Nm
View Answer & Discuss (5) WAEC 1990
685

A force F is applied to a body P as shown in the diagram above. If the body P moves through a distance r, which of the following represents the work done?

  • A. Fx
  • B. Fcosθ/x
  • C. Fx tanθ
  • D. Fx sinθ
  • E. Fx cosθ
View Answer & Discuss (2) WAEC 1990
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