(adsbygoogle = window.adsbygoogle || []).push({}); Supposed Energy Problems..Help!!

I have 2 questions...

A projectile is launched with a speed of 40 m/s at at angle of 60 degrees about the horizontal. Find the maximum height reached by the projectile during its flight by using conservation of energy.

I guess I don't get how to get the answer from a bunch of work, PE and KE equations. If you could give me a hint on this one on where to start, what equations to use I can probably figure it out.

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Second question...

A bead of mass m=5.00kg is released from point A and slides on the frictionless track shown in figure P5.30. Determine (a) the bead's speed at points B and C and (b) the net work done by the force of gravity in moving the bead from A to C.

I am also completely lost on this question too. I don't understand how you can get speed (v) from any of the work, PE, KE equations. Please give me a hint! I attached a crude picture of the graphic for this one...

Thank you so much if you respond.

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# Homework Help: Supposed Energy ProblemsHelp

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