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A boy weighing 350 N climbs up 30 steps....

A boy weighing 350 N climbs up 30 steps.each 20 cm high in 1 minute .Calculte:
(i)The work done ,and (ii)the power spent.

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AI Generated Solution

To solve the problem step by step, we will calculate the work done by the boy while climbing the stairs and then calculate the power he expended during that time. ### Step 1: Calculate the total height climbed The boy climbs 30 steps, and each step is 20 cm high. \[ \text{Total height} = \text{Number of steps} \times \text{Height of each step} \] ...
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ICSE- WORK ENERGY AND POWER-EXERCISE-2(A) (NUMERICALS)
  1. A body ,when acted upon by a force of 10 khf , get displaced by 0.5 m....

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  2. A boy mass 40 kg climbs up the stairs and reaches the roof at a height...

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  3. A man spend 6-4 KJ energy in displacing a body by 64 m in the directio...

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  4. A weight lifter lifted a load of 200 kgf to a height of 2.5 m in 5 s. ...

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  5. A machine raises a laod a 750 N through a height of 16 m in 5 s.Calcul...

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  6. An electric heater of power kW is used for 10 h.How much energy does i...

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  7. A water pump raises 50 litres of water through a height of 25 m in 5 ....

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  8. A pump is used to lift 500 kg of water from a depth of 80 m in 10 s .C...

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  9. An ox can a maximum force of 1000 N.It is taking part in a cart race a...

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  10. The power of a motor a is 40 kW .At what speed can the motor raise a l...

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  11. Rajan exerts a force of 150 N in pulling a cart at a constant speed of...

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  12. A boy weighing 350 N climbs up 30 steps.each 20 cm high in 1 minute .C...

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  13. IT takes 20 s for a person A of mass 50 kg to climb up the stairs. Whi...

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  14. A boy weighing 40 kgf climbs up a stair of 30 steps each 20 cm high in...

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  15. A man raises a box of mass 50 kg to a height of 2 m 10 s,while another...

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  16. A boy takes 3 minutes to lift a 20 litre water bucket from a 20 m deep...

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