Question

A lift that weighs 300N moves a man with a weight of 950N upwards by 12m. How much work is done to move the lift this height?

Answer 1

To calculate the work done on a lift moving upwards, combine the weights of the lift and the man, multiply by the distance moved. The work done is 15000 J.

Step-by-step explanation:

The work done to move the lift can be calculated using the formula: Work (W) = Force (F) x Distance (d). In this case, the force is the total weight of the lift and the man, and the distance is the height the lift is moved upwards. Therefore, the force is 300N (lift) + 950N (man) = 1250N, and the distance is 12m.By substituting the values into the formula, we get: W = 1250N x 12m = 15000 joules (J) So, the work done to move the lift this height is 15000 J.

Answer 2

15,000 J

Step-by-step explanation:

Since the lift also carries the man, the total weight of the man+lift system is

`F=300 N + 950 N = 1250 N`

The work done in moving the lift upward is

`W=Fd`

where

F is the weight of the lift+man combined system

d is the displacement

In this problem,

F = 1250 N

d = 12 m

Substituting,

`W=(1250)(12)=15,000 J`