Kenya KCSE · Physics

Measurement and mechanics

12 practice questions, each with the answer and an explanation.

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Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.

All 12 questions

  1. A car accelerates uniformly from rest to 20 m/s in 8 s. What is its acceleration?
  2. A body of mass 5 kg is acted on by a resultant force of 20 N. What is its acceleration?
  3. A stone is dropped from a cliff and takes 3 s to hit the ground. Taking g = 10 m/s2 and ignoring air resistance, how high is the cliff?
  4. A boy of mass 40 kg runs up a flight of stairs 3 m high in 6 s. What is his power? (g = 10 N/kg)
  5. A force of 50 N moves an object 4 m in the direction of the force. How much work is done?
  6. Which of these is a vector quantity?
  7. A ball of mass 0.5 kg moving at 4 m/s has kinetic energy of
  8. The unit of pressure in the SI system is the
  9. A block of weight 600 N rests on a floor and the area in contact is 0.3 m2. What pressure does it exert?
  10. A piece of wood of volume 0.002 m3 has a mass of 1.2 kg. What is the density of the wood?
  11. A spring extends by 4 cm when a load of 10 N is applied. What load gives an extension of 10 cm if the limit of proportionality is not passed?
  12. A uniform metre rule balances at the 50 cm mark. A 2 N weight hangs at the 20 cm mark. What weight hung at the 90 cm mark balances it?

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