Question

A collar B of mass 2kg is constrained ti move along a horizantal smooth and fixed circular track of radius 5m

Answer 1

Hello dear,
This is incomplete question. But don't worry I'll post complete one in image.

● Answer - 1440 N

● Explaination-
[Refer to the figure.]

Initial extension in the spring is 6 m,
Initial energy = 1/2 kx^2
Initial energy = 1/2 × 200 × 6^2
Initial energy = 3600 J

Upto reaching point A, this energy is converted to kinetic energy,
1/2 mv^2 = 3600 J
mv^2 = 7200 J

Normal reaction exerted on track by collar is-
N = mv^2 / r
N = 7200 / 5
N = 1440 N

Normal reaction exerted on track by collar is 1440 N

Hope this is useful...