Question

Physics help with torque!
The crank arm of a bicycle is 16.5 cm long. If a 52.0 kg woman puts all weight on one pedal, how much torque is developed
a. when the crank is horizontal
b. when the crank is vertical

Answer 1

I just know A ok

Answer 2

can u help me with a.

Answer 3

But anyway A is...84.2Nm

Answer 4

how do you find tht

Answer 5

give me one second...
F=mg
t(torch)=rF sin emtyset sign
emptyset sign =90 degrees
t(torch)= (0.165)(52.0)(9.81)(SIN165)
t(torch)= 84.2Nm

Answer 6

there you go...sorry I couldn't help you with b...

Answer 7

its alright

Answer 8

i have another question though ..
if a force of 4 N is needed to open a 1m wide door when applied at the edge opposite the hinges what force must be applied to open the door if you push against the door 10 cm from the hinged side

Answer 9

I'm not sure...sorry...

Answer 10

oh ok thanks