Question

A particle moves along the x-axis from x = 0 to x = 5m under the influence of a force given by F = 7 – 2x + 3x². The work done in the process is-

• A. 70
• B. 270
• C. 35
• D. 135

Answer 1

Answer: (D)

135

Answer 2

W = =$\int _ { 0 } ^ { 5 } \left( 7 - 2 x + 3 x ^ { 2 } \right) d x$

= = 35 – 25 + 125 = 135 J