Question

here is a challenge to find true physics genius.
If you give correct answer i will mark your answer as BRAINLIEST.

Starting from rest, A flat car is given a constant acceleration ao = 2 m/s2.
A cable is connected to a crate A of mass 50 kg as shown. Neglect the
friction between floor and car wheels and mass of pulley. The cofficient
of friction between crate & floor of the car is u = 0.3. The tension in
cable is -
(A) 700 N
(B) 350 N
(C) 175 N
(D) 0​

Answer 1

Answer:

350N

Explanation:

      

Here, 

M = 50 kg.

µ = 0.3 

a0 = 2 ms-2 

The block and the flat car comprise a mechanical system. Thus, the block moves forward with an acceleration a = a0.

Let the frictional force = f.

 

Since the system is non-inertial; a pseudo force will act on the block on the opposite side.

By FBD

T – f – ma0 = ma

=> T – µmg – ma0 = ma0

=> T – 0.3×50×10 = 2×50×2

=> T = 200 + 150 = 350 N

Thus, tension in the rope is 350 N.