how much energy is gained by a box of mass 20kg when man
(a)carrying wait for 5 minutes for a bus?
(b) run carrying the box with a speed of 3m/s to catch the bus?
(c)raise the box by 0.5 in order to place it inside the bus?
Answers
Answered by
153
1. zero because it is at rest
2.1/2 ×20 ×3×3
=90j
3 mgh =20×10×0.5
=100,j
I hope it will help you
2.1/2 ×20 ×3×3
=90j
3 mgh =20×10×0.5
=100,j
I hope it will help you
ck233:
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Answered by
26
a) no energy gained.
b)no energy gained as muscular energy is converted into kinetic energy.
c) potential energy gained= mgh
= 20 * .5 * 10 joules
= 100 J
b)no energy gained as muscular energy is converted into kinetic energy.
c) potential energy gained= mgh
= 20 * .5 * 10 joules
= 100 J
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