Question

The following graph shows the force exerted on and the displacement of object being pulled

Answer 1

The work done to pull the object 7.0 m is the total area under the graph from 0.0 m to 7.0 m, determined as 245 J.

Work done by the applied force

The area under force versus displacement graph is work done.

The total work done by pulling the object 7 m, can be grouped into two areas;

• First area, A1 = area of triangle from 0 m to 2.0 m
• Second area, A2 = area of trapezium, from 2.0 m to 7.0 m

A1 = ¹/₂ bh

A1 = ¹/₂ x (2) x (20)

A1 = 20 J

A2 = ¹/₂(large base + small base) x height

A2  = ¹/₂[(7 - 2) + (7-3)] x 50

A2 = ¹/₂(5 + 4) x 50

A2 = 225 J

Total work done

W = A1 + A2

W = 20 J + 225 J

W = 245 J

Learn more about work done here: brainly.com/question/8119756