Tangential Velocity Formula

The tangential velocity is the velocity measured at any point tangent to a turning wheel. Thus tangential velocity, vt is related to the angular velocity of the wheel, ω, and the radius of the wheel, r.

Vt = ω r

Vt = tangential velocity

ω = angular velocity

Tangential Velocity Formula Questions.

1) If the angular velocity of a turning bicycle wheel is 42 rad/s, and the wheel diameter is 68 cm, what is the tangential velocity?

Answer: The radius, r = 1/2 diameter of 68 cm = 34 cm = 0.34 m. The angular velocity, ω = 42 rad/s. Use the equation for tangential velocity.

Vt = ω r

Vt = (42 rad/sec) x 0.34 m

Vt = 14.28 m/s

2) If a wheel is turning at 12 m/sec, and its angular velocity is 6 radians/sec, what is the radius of the wheel?

Answer: The tangential velocity, Vt = 12 m/sec. The angular velocity, ω, is 6 radians/sec. Use the formula for tangential velocity to find the radius, r.

Vt = ω r

Vt / ω = r

r = 2 m

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