![Two rigid bodies of mass 5 kg and 4 kg are at rest on a frictionless surface until acted upon by a force of 36 N as shown in the figure](https://www.gkseries.com/blog/wp-content/uploads/2023/09/Two-rigid-bodies-of-mass-5-kg-and-4-kg-are-at-rest-on-a-frictionless-surface-until-acted-upon-by-a-force-of-36-N-as-shown-in-the-figure.jpg)
Q. Two rigid bodies of mass 5 kg and 4 kg are at rest on a frictionless surface until acted upon by a force of 36 N as shown in the figure. The contact force generated between the two bodies is
![](https://www.gkseries.com/blog/wp-content/uploads/2023/09/Screenshot-938.png)
(A) 4.0 N
(B) 7.2 N
(C) 9.0 N
(D) 16.0 N
Ans: 16.0 N
Sol:
Given that the minimum force required to cause movement is 36 N.
The net mass of both the block as both the block moves together with the same acceleration (m) m = 5 + 4 = 9 kg
![](https://www.gkseries.com/blog/wp-content/uploads/2023/09/image-74.png)