Question

2. A block of mass 2 kg is lying on a floor. The coefficient of
kinetic friction is 0.4. If a force of 2.5N is applied on the block
as shown in fig. then the magnitude of frictional force will be
(a) ION
(b) 7.5 N
(C) SN
(d) 2.5 N
​

Answer 1

Answer:

2.5 N

Explanation: According to newton's 3rd law of motion, every action has an equal and opposite reaction.

Answer 2

Answer:

D

Explanation:Because the force acting on the block by total friction is 5 N but 2.5 N is acting on the block so 2.5 N will be friction force