JEE Main 2024 Physics question
A force (3x² + 2x − 5) N displaces a body from x = 2 m to x = 4m. Work done by this force is ............J.
Answer: 58
Solution
W = ∫₂⁴(3x² + 2x − 5)dx = [x³ + x² − 5x]₂⁴ = (64 + 16 − 20) − (8 + 4 − 10) = 60 − 2 = 58 J.