I have two questions which I found difficulty in understanding:(adsbygoogle = window.adsbygoogle || []).push({});

1.) On a isosceles triangular-liked thing, with the base angles equal to 30 degrees, blocks X and Y are put on it on each side, with mass of X = 1kg, and mass of Y = 2kg, S is a spring balance of negligible mass( put on Y's side), and P is a smooth pulley fixed at th top of two smooth inclined planes. What is the reading of S when X is held stationary, and what is the reading when X is moving?

I have drawn the free-body diagrams of X and Y...There are mgsin 30 acting downwards for both X and Y, and T1 act upwards for X, while T2 act upwards for Y, so I think T1 and T2 should be considered....but seems that no..

2.) A smooth block of mass 2kg slides down a wedge. The wedge, of mass 10kg, is placed on a horizontal table, and its inclined plane makes an angle of 30 degrees with the horizontal. If the wedge remains stationary all the time, what is the normal reaction of the table acting on the wedge?

I get the weight and downward component = the reaction, and get 115 N....I wonder what it will be if there is friction? and it is more than 115N but less than 120N. I don't understand why it is this range, and why it is less than 120N

Please help~

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# Homework Help: Newtonian mechanis

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