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1) A man of mass 20 kg climb up a ladder in 20 secs. If the height of the ladder is 10 meter. what is the power used ????
CLASS 9 .... WORK AND ENERGY
Answers
Answered by
4
HERE IS UR ANS :-
Power is defined at as work done per unit time.
Work done = Change in potential energy.
= mg(h2-h1)
= 20x10x(10-0)
= 2000J
Power = 2000/20
= 100 w
HOPE THIS MAY HELP U :-)
Answered by
0
work done = f×d
d=10m
f=ma
=20×10=200N
work done=200×10=2000jule
power=work done/time
=2000/20=100W
your answer
d=10m
f=ma
=20×10=200N
work done=200×10=2000jule
power=work done/time
=2000/20=100W
your answer
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