A bicyclist applies the brakes and slows the motion of the wheels. The angular momentum of each wheel then decreases from 7.0 kg(m)^2 to 3.5 kg(m)^2 over period of 5.0 s. What is the angular impulse on each wheel?

A. -0.7 kg(m)^2/s
B. -1.4 kg(m)^2/s
C. -2.1 kg(m)^2/s
D. -3.5 kg(m)^2/s

(I don't understand which formula to put this problem in to get the answer..)

Question

A bicyclist applies the brakes and slows the motion of the wheels. The angular momentum of each wheel then decreases from 7.0 kg(m)^2 to 3.5 kg(m)^2 over period of 5.0 s. What is the angular impulse on each wheel?

A. -0.7 kg(m)^2/s
B. -1.4 kg(m)^2/s
C. -2.1 kg(m)^2/s
D. -3.5 kg(m)^2/s

(I don't understand which formula to put this problem in to get the answer..)

anonymous · Answer

@ganeshie8 Do you know how to do physics? :o

vincent-lyon.fr · Answer

you have to work out change in angular momentum divided by time taken

masumanwar · Answer

0.7 as the change in angular momentum is the difference in the angular momentum before and after the break and then divided by the 5 second