daily life examples in which you observe conservation of energy (AS
4. Give some examples for renewable sourcess of energy (AS)
Application of concepts
1. A man carrying a bag of total mass 25kg climbs up to a height of 10m in 50 secon
Calculate the power delivered by him on the bag. (AS) (Ans: 49)
2. A 10kg ball is dropped from a height of 10m. Find (a) the initial potential energy
the ball, (b) the kinetic energy just before it reaches the ground, and (c) the spe
just before it reaches the ground. (AS) (Ans: 980J, 980J, 14m/s)
3. Calculate the work done by a person in lifting a load of 20 kg from the ground a
placing it Im high on a table. (AS) (Ans: 196N-m)
4. Find the mass of a body which has 5 of kinetic energy while moving at a speed
2m/s. (AS) (Ans: 2.5 kg)
5. A cycle together with its rider weighs 100kg. How much work is needed to set it
moving at 3 m/s. (AS) (Ans: 450J)
5. Which of the renewable sourcess of energy would you think soutable to produce
in you native place. Why? (AS)
Higher Order Thinking Questions
Answers
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Answer:
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