Answers

2016-02-27T16:46:19+05:30
Mass of the 1 brick = 2.5 kg
mass of 10 bricks= 2.5 × 10 = 25 kg

power = work done × displacement / time
           =  mgh/t
           = 25 × 10 × 20 / 50
            =  100

there the power is 100 W


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2016-02-29T12:53:47+05:30
Mass of 10 bricks= 2.5×10
=25 kg
power=work done ×displacement/time
=25×10×20/50
=100W
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