Questions 7-8: A boy is riding a bicycle exactly WEST with initial speed v0 = 15

Question

Questions 7-8: A boy is riding a bicycle exactly WEST with initial speed v0 = 15:00 m/s. The boy
applies breaks, and the bicycle slows down to speed vf = 9:00 m/s in 3.0 s. Assume the wheels roll without
slipping. Also assume that a wheel has a radius of R = 0:500 m and a mass m = 0:800 kg, and assume all
the mass is in the rim.

7.) What is the INITIAL angular momentum of the front wheel?
A.) 3.00 kg m2/s, SOUTH
B.) 3.00 kg m2/s, NORTH
C.) 3.00 kg m2/s, WEST
D.) 6.00 kg m2/s, SOUTH
E.) 6.00 kg m2/s, NORTH
AB.) 6.00 kg m2/s, WEST

8.) What is the the torque on the wheel?
A.) 0.400 Nm, SOUTH
B.) 0.400 Nm, NORTH
C.) 0.400 Nm, EAST
D.) 0.800 Nm, SOUTH
E.) 0.800 Nm, NORTH
AB.) 0.800 Nm, EAST

Please explain and show work

Explanation / Answer

C.) 3.00 kg m2/s, WEST C.) 0.400 Nm, EAST

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