A man of mass 90kg carries a block of mass 20kg up a vertical ladder at length 5m. What work has the woman done. (take g 10m /s)

None - she is sitting drinking a Mai Tai and watching the man do the lifting.

But,

work = Force*distance = mass*g*distance

5500

To calculate the work done by the man in carrying the block up the vertical ladder, we need to determine the change in potential energy.

The potential energy of an object is given by the equation: potential energy = mass * height * gravitational acceleration.

In this case, the man is carrying the block up a ladder, so the height is equal to the length of the ladder, which is 5m.

The potential energy change is given by the equation: change in potential energy = (mass of the man + mass of the block) * height * gravitational acceleration.

Given that the mass of the man is 90kg and the mass of the block is 20kg, the total mass is 110kg.

Using the provided gravitational acceleration of 10m/s^2, we can calculate the change in potential energy:

change in potential energy = 110kg * 5m * 10m/s^2
= 5500 kg*m^2/s^2

Therefore, the work done by the man in carrying the block up the ladder is 5500 Joules (J).