How much power is needed to lift a 4.5 kg object to a height of 3.0 m in 12 seconds?solution and formula, Help me please i need it now T_T no body answer correctly i just ask again again and again :
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Correct option is
C
100kW
m=10
5
kg,g=10ms
−2
,h=360m,t=1h=3600s
The work needed in lifting a mass m to a height h against the force due to gravity is W=mg×h
And, power, P=
t
W
=
t
mgh
∴P=
3600
10
5
×10×360
W=10
5
W=100kW
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