Author Question: A cyclist does work at the rate of 500 W while riding. How much force does her foot push with when ... (Read 26 times)

Destiiny22 · **on:** Jul 29, 2018

A cyclist does work at the rate of 500 W while riding. How much force does her foot push with when she is traveling at 8.0 m/s?

A)

31 N

B)

63 N

C)

80 N

D)

160 N

E)

4000 N

Question 2

An incompressible fluid flows irrotationally through a tube of circular crosssection that has greater diameter at one end than the other. What conclusion can you reach about the speed of the fluid at the ends of the tube?

A)

The flow must be at a slower speed at the end with a greater diameter.
B)

The speed of the flow must be the same at both ends.
C)

Pressures and tube heights must be known to relate the flow speeds at the two ends.
D)

The flow must be at a faster speed at the end with a greater diameter.
E)

No conclusions can be reached based on this information.