# Physics

A pendulum bob has a mass of 1kg. The length of the pendulum is 2m. The bob is pulled to one side to an angle of 10degree from the vertical. What is the velocity of the pendulum bob as it swings through it's lowest point? What is angular velocity?

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1. The mass doesn't matter. The trick is to find h so we can set mgh = 1/2 mv^2 (see why m doesn't matter?)
In this case h = 2 - 2cos10 (draw the picture, you'll see)
for omega, use the v you found and
v = r omega
so omega = v/r

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2. a pendulum bob has a mass of 1kg.the length of the pendulum is 2m the bob is pulled to one side to an angle of 10 from the vertical a.what is the velocity of the pendulum bob as it swings through its lowest point b.what is the angular velocity of the pendulum bob?

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3. A pendulum Bob hasa mass of 1kg. The length of the pendulum is 2 m. The Bob is pulled to one side to an angle of 1o degree from the vertical . what is the velocity of the pendulum bob as it swings through its lowest point ?

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5. 1.4m/s

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6. 2ghsin10=√2*9.8*2*0.174

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7. V=√2gL(1-cos10)

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