Question

a cycle together with its rider
weighs 100 kg how much work is needed to set it moving at 3 metre per second

Answer 1

heya!
here's your answer!
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As we may know,
Power = Force x Velocity

it can also be written as ,

power = Mass x Acceleration due to gravity x velocity

(Mass x Acceleration due to gravity) = Force

therefore ,
the formula will be,

Power = mg x velocity

given ,
velocity = 3 m/s
m = 100 kg
since the value of g isn't specified , we will take average value = 9.8 m/s²

therefore ,
Power = 100 x 9.8 x 3
. = 980 x 3
. = 2940 W

Therefore , Answer is 2940 W

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Hope this helps you:)

Answer 2

Hi !

Please refer the image for Answer and as value of 'g' wasn't mentioned, let's take it as 10m/s^2.

Hope it helps...!!!