Question

1. a gardener lifts a 20 kg bag of soil from the ground and places it on a shelf that is 1.5 m high. how much work is done on the bag of soil?

Explanation:

Step1: Calculate the force

The force \(F\) required to lift the bag is equal to its weight. Using the formula \(F = mg\), where \(m = 20\space kg\) and \(g= 9.8\space m/s^{2}\). So \(F=20\times9.8 = 196\space N\).

Step2: Calculate the work - done

The work - done \(W\) in lifting an object is given by the formula \(W = Fd\), where \(d = 1.5\space m\) and \(F = 196\space N\). So \(W=196\times1.5=294\space J\).

Answer:

\(294\space J\)