Recent content by wesson

My apologies for the delayed response. I still can't see how the tension of the string is able to exert a horizontal force on M1 if there is no friction between them (specifically, the horizontal bit over the pulley). I'm not sure how the vertical bit of string would exert a force either...

Thanks for the replies, everyone. How does the tension on the string exert a force on the pulley if it's massless and the surfaces are frictionless?

Homework Statement For context, the first question for this diagram asks for the force F on m1 needed to keep m3 at a constant height. The second question (which I'm struggling with) asks for the acceleration of m1 in the case where the force F=0. All surfaces are frictionless and I've...