A water pipe in a building delivers 1000 liters (with mass 1000 kg) of water per second. The water is moving through the pipe at 1.4 m/s. The pipe has a 90° bend, and the pipe will require a supporting structure, called a thrust block, at the bend, as in Figure P9.70. We can use the ideas of momentum and impulse to understand why. Each second, 1000 kg of water moving at v_x = 1.4 m/s changes direction to move at v_y = 1.4 m/s.

a. What are the magnitude and direction of the change in momentum of the 1000 kg of water?

b. What are the magnitude and direction of the necessary impulse?

c. This impulse takes place over 1.0 s. What is the necessary force?

Transcribed Image Text:

FIGURE P9.70