Thread: Hard A-Level Question

A particle of mass 4kg rest on a smoothplane inclined at 60(degrees) to the horizontal. The particle is attached to one end of a light inelastic string which passes over a fixed smooth pulley at the top of the plane and carried a particle of mass 2kg at the other end.
Find
a)the acceleration of the system
b)the tension in the string

Thanks

Originally Posted by helpishere

A particle of mass 4kg rest on a smoothplane inclined at 60(degrees) to the horizontal. The particle is attached to one end of a light inelastic string which passes over a fixed smooth pulley at the top of the plane and carried a particle of mass 2kg at the other end.
Find
a)the acceleration of the system
b)the tension in the string

Thanks

Since the acceleration of the system is constant we can solve the above equations for "a" and set them equal to each other.



We can clear the fractions by multiplying by







Just plug in and finish from here.

I hope this helps and good luck.