please solve this guyssss
answer question 12
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Explanation:
Answer...................
Given : Pump spend 400000J of energy in 10 sec .
2.5 kg mass kept at height of 15 m
To Find : Power of the pump.
Gravitational potential energy
Solution:
Power = Energy Time
Energy = 400000J = 400 kJ
Time = 10 sec
Power = 400/10 kJ/s
=> Power = 40 kJ/s
J/s = Joule/sec = W ( watt)
=> Power = 40 kW
Gravitational potential energy = mgh
m = 2.5 kg
g = 10 m/s²
h = 15 m
PE = 2.5 x 10 x 15
= 375 J
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