In the figure shown find work done by tension in string on 3 kg block in first two second, from beginning of motion. The system is set free at t = 0 (g = 10 m/s²) (Assume pulley and string is ideal)

Question

G1 Physics · Accepted Answer

For the 2 kg-3 kg Atwood system, a=(3-2)g/(3+2)=2 m/s² and the 3 kg block moves s=½at²=4 m in 2 s. T=3(g-a)=24 N upward while displacement is downward, so W(T)=-Ts=-96 J. Hence A.