Two bodies of masses 10 kg (A) and 20 kg (B) respectively kept on a smooth, horizontal surface are t

Question

Two bodies of masses 10 kg (A) and 20 kg (B) respectively kept on a smooth, horizontal surface are tied to the ends of a light string. A horizontal force F = 600 N is applied to block A along the direction of the string. What is the tension in the string?

Professor PC Thomas Classes · Answer

Acceleration of the system $a = \frac{F}{m_A + m_B} = \frac{600}{30} = 20$ m/s². The string pulls mass B. Tension $T = m_B a = 20 	imes 20 = 400$ N.