A cyclist weighs 60 kg, and her bicycle weighs 6.8 kg. What is the momentum of the cyclist when riding her bike at 4 m/s southward?

Question

Quizplus · Accepted Answer

Since both the cyclist and her bicycle are traveling at 4 m/s, we need to account for the combined mass, which is 66.8 kg. She is riding southward, so the answer needs to include the direction (south) as well.
p = momentum (measured in kg⋅m/s)
m = mass (measured in kg)
v = velocity (measure in m/s)
Thus, the momentum, p, is:
p = 66.8 kg x 4 m/s
p = 267.2 kg m/s south

A Cyclist Weighs 60 Kg, and Her Bicycle Weighs 6