JAMB and WAEC Physics questions: Simple machines

24 questions with answers and explanations. Tap an option to check yourself.

1. Question 21· Simple machines· JAMB

   A machine with velocity ratio 5 has an efficiency of 80%. Its mechanical advantage is:

   • A6.25
   • B5
   • C4
   • D0.16

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2. Question 22· Simple machines· WAEC

   A machine has a velocity ratio of 5 and an efficiency of 80%. Its mechanical advantage is

   • A6.25
   • B4
   • C0.16
   • D400

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   Explanation and discussion

3. Question 23· Simple machines· JAMB

   A lever has an effort arm of 60 cm and a load arm of 20 cm. Find its velocity ratio.

   • A40
   • B3
   • C1/3
   • D1200

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   Explanation and discussion

4. Question 24· Simple machines· WAEC

   In a first-class lever, the fulcrum is

   • Aoutside the lever
   • Bat one end with the load in the middle
   • Cat one end with the effort in the middle
   • Dbetween the effort and the load

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   Explanation and discussion