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posted by  Dolores on 11/4/2009 10:37:33 PM  |  status: Closed  |  Earned Karma: 55

torque

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N/A N/A N/A N/A 11/5/2009 at 8:00:00 AM
Question Details:
To warm up before a game baseball pitcher tosses a 0.15 kg ball by rotating his forearm which is .32 m in length to accelerate ball.  Ball starts at rest and is thrown at speed of 12 m/s in 0.40 s  While ball is in pitcher's hand what is torque applied to ball to produce the angular acceleration?
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posted by jacksparrow on 11/4/2009 11:09:52 PM  |  status: Live
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Response Details:
acceleration = speed / time
a = 12 / 0.4
a = 30 m/s2

F = ma
F = (0.15) (30)
F = 4.5 N

τ = F * r
τ = 4.5 * 0.32
τ = 1.44
Tags: Torque
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