AL: ) solid,grid,void feild, 10.27.1. | + v, The Expert TA | Human-× PeopleSoft

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AL: ) solid,grid,void feild, 10.27.1. | + v, The Expert TA | Human-× PeopleSoft session expired eexpertta.com/Com mon/TakeTutorialAssignment.aspx Home 1 Student astrid.sandoval@mavs.uta.edu Class Management I Help HW13( Linear omentum) Begin Date: 10/20/2017 12:00:00 AM- Due Date: 10/30/2017 11:59:00 PM End Date: 12/14/2017 12:00:00 AM (10%) Problem 7: A car moving at 12 m/s crashes into a tree and stops in 0.28 s. 50% Part (a) Calculate the magnitude of the force, in newtons, the seatbelt exerts on a passenger in the car to bnng him to a halt. The mass of the passenger is 66.3 kg. Grade Summary Potential 100% Submissions sino cosO oan i acos0 atan( acotansinho cosh) tanh cotanh0 e Degrees Radians 4 5 6 Attempts remaming 1 (2% per attempt) detailed view 0 Subest Hint I give up Hints: deduction per hmt Hints renaming: "I Feedback:-deduction per feedback. 50% Part (b) What would the final velocity be, in meters per second if the car with the 663 kg passenger had collided with (and stuck to) a car that has a mass equal to and is traveling in the opposite direction and at the same speed?

Explanation / Answer

Here ,

initial speed , u = 12 m/s

time taken ,t = 0.28 s

part a)

magnitude of the force = change in momentum/time

magnitude of the force = 66.5 * (12 - 0)/.28

magnitude of the force = 2850 N

part b)

let the final speed is v

v * (66.5 + 66.5) = 66.5 * 12 - 12 * 66.5

v = 0 m/s

the speed is 0 m/s

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