Author Question: Water is flowing through a V-shaped weir, which has a 30 vertex. The flow rate is 7.0 x 104 kg/s ... (Read 79 times)

lracut11 · **on:** Jul 29, 2018

Water is flowing through a V-shaped weir, which has a 30 vertex.

The flow rate is 7.0 x 104 kg/s and the speed of the flow is 5.0 m/s. What is the distance from the surface of the water to the vertex?
A) 3.6 m
B) 7.2 m
C) 4.8 m
D) 9.6 m
E) 14.4 m

Question 2

A fireman is sliding down a fire pole. As he speeds up, he tightens his grip on the pole, thus increasing the vertical frictional force that the pole exerts on the fireman. When this force equals the weight of the fireman, what happens?

A) The fireman comes to a stop.
B) The fireman descends with slower and slower speed.
C) The fireman descends with a smaller acceleration.
D) The fireman continues to descend, but with constant speed.
E) Cannot be determined without additional information.