Answer to Question #285481 in Physics for Kaidi

Question

1) What is the momentum of a cyclist with a total mass (bike + rider) of 78.3kg moving with a velocity of 19.4m/s?

 2) Ten seconds after an electric fan is turned on, the fan rotates at 7.3rev/min. Its average angular acceleration is:

Select one:

a. 0.076

b. 0.01

c. 0.04

d. 4.59

e. 0.76 

3) A 124.6-kg object is dropped from a height of 3.8m above a spring with a constant of 14235.8N/m. How much (in cm) will the spring be compressed?

Answer 1

1) The momentum is

$$p=mv=1519\text{ kg m/s}.$$

2) 0.01 rad/s.