Q.
Two bodies $A$ and $B$ of masses 10 kg and 15 kg respectively kept on a smooth, horizontal surface are tied to the ends of a light string. If $\ T$ represents the tension in the spring when a horizontal force $F = 500\ N$ is applied to $A$ (as shown in figure 1) and T$''$ be the tension when it is applied to $B$ (figure 2), then which of the following is true
A) $T = T^{'} = 500\ N$
B) $T = T^{'} = 250\ N$
C) $T = 200\ N,\ T^{'} = 300\ N$
D) $T = 300N,\ T^{'} = 200\ N$
Explanation
(d) Acceleration $= \frac{500}{25} = 20\ m/s^{2}$ in both the cases
[image:5_image214.emf]
In fig 1, $T = 500 - 10 \times 20 = 300\ N$
In fig 2, $T^{''} = 500 - 15 \times 20 = 200\ N$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.