Problem 3.3 (a) What is the magnitude of the force that acts on a firefighter holding a fire hose that ejects 410L water per minute with a muzzle speed of 35 m/s ?Hint: What is the mass of water per time ejected?(b) A soccer game: One player shoots the soccer ball of m = 420 g with a speed of 110 km/htowards the goal. Her team mate hits the ball with her head, and the ball gets reflected directlyback. What is the force acting on the head of the player? Assume a contact time between ball andhead of 0.05 s.

1.) Given rate of flow (Q) = 410L Velocity of muzzle v = 35m/sec We have to find the force…

(a) What is the magnitude of the force that acts on a firefighter holding a fire hose that ejects 410 L water per minute with a muzzle speed of 35 m/s ? Hint: What is the mass of water per time ejected?

(a) What is the magnitude of the force that acts on a firefighter holding a fire hose that ejects 410 L water per minute with a muzzle speed of 35 m/s ? Hint: What is the mass of water per time ejected?

Classical Dynamics of Particles and Systems

5th Edition

ISBN:9780534408961

Author:Stephen T. Thornton, Jerry B. Marion

Publisher:Stephen T. Thornton, Jerry B. Marion

Chapter9: Dynamics Of A System Of Particles

Section: Chapter Questions

Problem 9.65P

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Question

Problem 3.3

(a) What is the magnitude of the force that acts on a firefighter holding a fire hose that ejects 410
L water per minute with a muzzle speed of 35 m/s ?
Hint: What is the mass of water per time ejected?
(b) A soccer game: One player shoots the soccer ball of m = 420 g with a speed of 110 km/h
towards the goal. Her team mate hits the ball with her head, and the ball gets reflected directly
back. What is the force acting on the head of the player? Assume a contact time between ball and
head of 0.05 s.

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