7BSp2009Q3_5Solutions

7BSp2009Q3_5Solutions - 7B Quiz 3 A ball is acted on by...

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7B Quiz 3 rring to your picture in part a), briefly explain how the 7000kg hanging mass is able to the same thing as saying that the clockwise , the direction of into the paper. out of the paper. out to tion. e. This means that the A ball is acted on by only three forces and these three result in a net force of zero . The forces act in the directions shown in the force diagram to the right but the magnitudes shown are not necessarily correct. You know that F by object 3 on ball has a magnitude of 50 N. a) Find the magnitude of the force F by object 1 on ball . b) Find the magnitude of the force F by object 2 on ball . For the net force to be = 0 you must have the horizontal component (let’s call it the x-component) of the net force = 0 AND the vertical component (let’s call it the y-component) of the net force = 0. F by object 3 on ball F by object 1 on ball F by object 2 on ball 30 ° 45 ° When we say the x-component of the net force = 0 we mean that the x-components of the three forces sum to zero so F 1x + F 2x + F 3x = 0.
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