A physics question?

1 ⤊

A cyclist uses 27,000 joules per minute (this is about 385 food Calories per hour) to cycle at a constant pedaling rate of 450 radians per minute along a flat road using a gear ratio of 4. Find the torque exerted on the rear gear wheel. ?

2007-08-04 07:32:51 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Physics

2 answers

Work over time = power
Torque times angular velocity = power

Torque ratio 4:1

W/t=P
T O = P
Tw = 4T

T= (W/t)/O
Tw= 4 T= 4 (W/t)/O

W= 27,000 joules
t= 60 sec
O= 450 rad / 60 sec

Just do the math

BTW what was the radius on the wheel? LOL

2007-08-04 19:11:39 · answer #1 · answered by Edward 7 · 0⤊ 1⤋

The net torque acting is given by
Torque = 27000/(450*4) = 15Nm

2015-12-03 06:46:52 · answer #2 · answered by Pleh.Epar 3 · 1⤊ 0⤋