The work done in moving a body of mass 10 kg from the bottom of a smooth inclined plane of length 4 m and inclination 60° is ______ J. Take g = 10 m s⁻².
Physics · Mixed Chapter
JEE Main Practice

Question

The work done in moving a body of mass 10 kg from the bottom of a smooth inclined plane of length 4 m and inclination 60° is ______ J. Take g = 10 m s⁻².

G1 Physics · Accepted Answer

Step 1: Vertical height gained h = L sin 60° = 4 × (√3/2) = 2√3 m. Step 2: On a smooth incline, work against gravity = gain in gravitational potential energy: W = mgh. Step 3: W = 10 × 10 × 2√3 = 200√3 J ≈ 346.410 J. Final answer to one decimal place: 346.4 J.