Question

A pulling a lift a box of mass 15kg from the ground to a height of 3m calculate the work done by pulling on the box

Answer 1

Express your understanding of the concept and mathematics of work by answering the following questions. When done, click the button to view the answers.

1. Apply the work equation to determine the amount of work done by the applied force in each of the three situations described below.

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2. On many occasions, there is more than one force acting upon an object. A free-body diagram is a diagram that depicts the type and the direction of all the forces acting upon an object. The following descriptions and their accompanying free-body diagrams show the forces acting upon an object. For each case, indicate which force(s) are doing work upon the object. Then calculate the work done by these forces.

Calculate your answer by this..

Answer 2

work done = energy spend

here energy = potential energy

P.E = mgh

m = 15 kg

g = 9.8 m/s^2

h = 3m

w = mgh

w = 15 × 9.8 × 3

w= 441J

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