Two girls each weight 400N, climb up a rope through a height of 8m, We name one of the girls as A and the other as B. girls A takes 20s while girl B takes 50 seconds to accomplish this task. What is the power expended by each girl ?
Answers
(400×8)/20=160 j
B
(400×8)/50=64j
Answer:
✯✯ QUESTION ✯✯
Two girls, A and B each of weight 400 N climb up a rope through a height of 8 m. Girl A takes 20 s while Girl B takes 50 s to accomplish this task. What is the power expended by each girl?
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✰✰ ANSWER ✰✰
➮For Girl A : -
\longmapsto\tt{Weight=400N}⟼Weight=400N
\longmapsto\tt{Height=8m}⟼Height=8m
\longmapsto\tt{Time=20sec}⟼Time=20sec
➥Using Formula : -
\longmapsto\tt{\small{\boxed{\bold{\bold{\purple{\sf{Power=\dfrac{F\times{s}}{t}}}}}}}}⟼
Power=
t
F×s
➥Putting Values : -
\longmapsto\tt{\dfrac{400\times{8}}{20}}⟼
20
400×8
\longmapsto\tt{40\times{4}}⟼40×4
\longmapsto\tt\bold{160\:Watt}⟼160Watt
_______________________
➮For Girl B : -
\longmapsto\tt{Weight=400N}⟼Weight=400N
\longmapsto\tt{Height=8m}⟼Height=8m
\longmapsto\tt{Time=5sec}⟼Time=5sec
➥Using Formula : -
\longmapsto\tt{\small{\boxed{\bold{\bold{\green{\sf{Power=\dfrac{F\times{s}}{t}}}}}}}}⟼
Power=
t
F×s
➥Putting Values : -
\longmapsto\tt{\dfrac{400\times{8}}{50}}⟼
50
400×8
\longmapsto\tt{8\times{8}}⟼8×8
\longmapsto\tt\bold{64\:Watt}⟼64Watt
Power expended by Girl A is 160W..
Power expended by Girl B is 64W..