JEE Main 2026 Physics question
A body of mass 2 kg begins to move under the influence of time dependent force N, where î and ĵ are unit vectors along x and y-axis respectively. The power produced by the force at t = 2 s is W.
Answer: 200
Solution
a = F/m = (t, 3t²). v = (t²/2, t³) (starting from rest). At t=2: v=(2,8), F=(4,24). P = F·v = 8+192 = 200 W.