A sketch of the crane is given below The cable cannot transm

A sketch of the crane is given below:

The cable cannot transmit any compression force to slow down the mass in the final stage of the upward journey.

A sketch for D is given below:

Motor Power	P	650 kW
Transmission Efficiency	$\"\\eta\"$	0.9

The Transmisson Effeciency Is Defined as , Ratio of Power received over transmission path to the power Transmitted.

Here we have, n=0.9 & Power received = 650 kw. Therefore power transmitted = 65000 w / 0.9 = 72222.23 watt

Load = 1 tonne , Distance = 100m

So time required to lift the 1 tonne load through the distance of 100m

F= m * a

F = 1000 (tonne) * 10 m²/s = 10000 N

We have, Power (Transmitted) = Force x Velocity

Power (Transmitted) = 10000 x Velocity

72222.23 = 10000 x Velocity

Therefore, Velocity = 7.223 m/s

Velocity = Distance / Time

7.223 = 100 / Time (Given That Distance = 100 m )

Time = 13.844 sec

This is The T trip (total time for lifting) = 13.844 sec.