Q: A block of mass 2 kg, moving with the initial speed of 3 m/s comes to rest on a rough horizontal surface after travelling a distance of 3 m. The magnitude of the frictional force is:
(a)9 N
(b)3 N
(c)18 N
(d)1 N
Correct Answer: (b)
The correct answer is (b): 3 N. Subject: Indian Economy | Sub-topic: General