Question

The relationship between force and position is shown in the figure given (in one dimensional case). The work done by the force in displacing a body from $x = 1$ cm to $x = 5$cm is

• A. 20 ergs
• B. 60 ergs
• C. 70 ergs
• D. 700 ergs

Answer 1

Answer: (A)

20 ergs

Answer 2

Work done = Covered area on force-displacement graph = 1 × 10 + 1 × 20 – 1 × 20 + 1 × 10 = 20 erg.