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In a time t=17.00 s, a 66.0-kg student runs at a steady pace up two flights of stairs whose combined vertical height is 7.60 m. Compute the student's power output in doing work against gravity.

Question

In a time t=17.00 s, a 66.0-kg student runs at a steady pace up two flights of stairs whose combined vertical height is 7.60 m. Compute the student's power output in doing work against gravity.

check_circleAnswer
Step 1
Giren
Mam of Atudlent
vecal height, h= 7.60 m
66.0 k3
Time,
t 17.00
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Giren Mam of Atudlent vecal height, h= 7.60 m 66.0 k3 Time, t 17.00

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Step 2
During Ateady pace, velociy sconstant
and Change fn kinetic energy
Ak o. while moving up tetais
would increane he poten hal eney
AP= mgh, wher h A vertcal
height
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During Ateady pace, velociy sconstant and Change fn kinetic energy Ak o. while moving up tetais would increane he poten hal eney AP= mgh, wher h A vertcal height

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Step 3
From the work- Energy Heorem
Wnet
AK t AP
1
where, Wne s He nef wook done,
Ak is the chanse fn kinetc energy
and P is he change Pn poten t'al
energ7
Wnet
11
&6.0k9)19.81m)s7.6om)
4920-67J
11
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From the work- Energy Heorem Wnet AK t AP 1 where, Wne s He nef wook done, Ak is the chanse fn kinetc energy and P is he change Pn poten t'al energ7 Wnet 11 &6.0k9)19.81m)s7.6om) 4920-67J 11

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Science

Physics

Work,Power and Energy

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