Question

what is the quantity of work done when a crane lifts a 100 - n block from 2 m above the ground to 6 m above the ground?
100 j
200 j
400 j
600 j

Explanation:

Step1: Calculate the height difference

The height difference \(h = 6 - 2=4\space m\)

Step2: Use the work - formula

The formula for work \(W = F\times h\), where \(F = 100\space N\) and \(h = 4\space m\). So \(W=100\times4\)

Answer:

\(400\space J\) (the third option)