The Student Room Group

Isaac Physics help

I'm very stuck on this question, could someone help please?

A light string is tied to two pegs P and R, with R above and to the right of P. A mass m is attached to a point Q on the string such that the section PQ is horizontal and the section QR makes an angle of θ=30 to the horizontal.

If the system is in equilibrium, what is the tension in the section of string PQ? Please express the value of any trigonometric function as a surd.

Reply 1

Original post
by GoldPhantomz
I'm very stuck on this question, could someone help please?

A light string is tied to two pegs P and R, with R above and to the right of P. A mass m is attached to a point Q on the string such that the section PQ is horizontal and the section QR makes an angle of θ=30 to the horizontal.

If the system is in equilibrium, what is the tension in the section of string PQ? Please express the value of any trigonometric function as a surd.
Have you sketched it and resolved/balanced forces, or drawn a forces triangle?
(edited 2 years ago)

Reply 2

Original post
by mqb2766
Have you sketched it and resolved/balanced forces?

Reply 3

Original post
by mqb2766
Have you sketched it and resolved/balanced forces, or drawn a forces triangle?
They provide the following picture:
But still, I am unsure

Reply 4

Resolve vertically to find T_QR, then horizontally to find T_QP.

Quick Reply

How The Student Room is moderated

To keep The Student Room safe for everyone, we moderate posts that are added to the site.