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**1. There is a pendulum of Length 2.1m. Its bob has speed Vo when the cord makes the angle 48' with the vertical.**

a) what is the speed of bob in lowest posotioin if Vo=8m/s?

What is the least value Vo could have is pendulum is to swing down and then up to:

b) a horizontal position

c) a vertical position with cord remaining straight

a) what is the speed of bob in lowest posotioin if Vo=8m/s?

What is the least value Vo could have is pendulum is to swing down and then up to:

b) a horizontal position

c) a vertical position with cord remaining straight

**2. I understand that this is a conservation of energy problem and K1 + U1 = K2 + U2 and i tried using this with K=1/2mv^2 and U=mgy but it didn't work.**

Also, i know the answer to c involves something to do with tension, but i'm not sure how to use it.

Also, i know the answer to c involves something to do with tension, but i'm not sure how to use it.

Thanks for any help!