Question

a body of mass m is tied to a string of length l tied to the top of a trolley moving with an acceleration a calculate the maximum angle the string will make with the vertical​

Answer 1

Explanation:

Given,

mass=m,length=l,force=f,angle=θ

By the work energy theorem, since the change in KE is zero, so the total work done by all forces must equal to zero.

Thus,

W

f

+W

g

=0

Where W

f

is the final work done, W

G

is the initial work done.

W

f

=−W

g

W

f

=−mgl(1−cosθ)

Since W

g

=mgl(1−coθ)