The motor of a crane uses power p to lift a steel beam.
P = mgh / t P ‘ = mg 2h / [ t/2 ] = 4 mgh / t = 4 P 4 times We know that Power = workdone / time = m g h / t Now P ‘ = m g h’ / t’ Given that h’ = 2 h t’ = […]
The motor of a crane uses power p to lift a steel beam. Read More »
