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Elliot
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1. in a tire-throwing competition, a man holding a 23.5 kg car tire quickly swings the tire through three full turns and releases it, much like a discus thrower. the tire starts from rest and is then accelerated in a circular path. the orbital radius "r" for the tire's center of mass is 1.10 m, and the path is horizontal to the ground. the man applies a constant torque of 20.0 N m to accelerate the tire at a constant angular acceleration. Assume that all of the tire's mass is at a radius R = 0.35 m from its center.
what is the time, t, required for the tire to complete three full revolutions?2. T=[2(pi)(r)]/v
Torque = Inertia * angular acceleration3. T=Inertia * angular acceleration
T=Inertia * (linear acceleration/radius)
T=Inertia * (linear velocity^2/radius^2)
20=[(23.5*.35^2)]*(linear velocity^2/.75^2)
linear velocity = 2.9 m/s
T=[2(pi)(1.1)]/2.9 = 2.38
2.38 * 3 revolutions = 7.15
I think the problem is my radius, I don't know which ones I am supposed to use. the answer is supposed to be 7.68s, but I am close with 7.15. can someone tell me what I am doing wrong?
what is the time, t, required for the tire to complete three full revolutions?2. T=[2(pi)(r)]/v
Torque = Inertia * angular acceleration3. T=Inertia * angular acceleration
T=Inertia * (linear acceleration/radius)
T=Inertia * (linear velocity^2/radius^2)
20=[(23.5*.35^2)]*(linear velocity^2/.75^2)
linear velocity = 2.9 m/s
T=[2(pi)(1.1)]/2.9 = 2.38
2.38 * 3 revolutions = 7.15
I think the problem is my radius, I don't know which ones I am supposed to use. the answer is supposed to be 7.68s, but I am close with 7.15. can someone tell me what I am doing wrong?
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