Homework Help: physics

Posted by farah on Thursday, September 6, 2012 at 11:00am.

A 0.33- kg pendulum bob is attached to a string 1.2 m long and hangs vertically as shown in Figure 1. What is the change in the pendulum bob’s gravitational potential energy as it swings from the lowest point of the pendulum to a point that is 35 degree to the vertical?

physics - bobpursley, Thursday, September 6, 2012 at 11:02am
Figure from the geometry the change in vertical height.

PE=mgh
physics - farah, Thursday, September 6, 2012 at 11:09am
can you give the solution?
physics - bobpursley, Thursday, September 6, 2012 at 12:06pm
Yes, I could.

I will be happy to check your work, but you need to do your own thinking. Answer grazers learn nothing.
physics - Anonymous, Thursday, October 18, 2012 at 3:41pm
p=mgh
p=.33*9.8*(1.2-1.2*cos35)
P=70.2M

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