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Solved: Professional Application A car moving at 10 m/s
Chapter 8, Problem 8(choose chapter or problem)
Problem 8PE
Professional Application A car moving at 10 m/s crashes into a tree and stops in 0.26 s. Calculate the force the seat belt exerts on a passenger in the car to bring him to a halt. The mass of the passenger is 70 kg.
Questions & Answers
QUESTION:
Problem 8PE
Professional Application A car moving at 10 m/s crashes into a tree and stops in 0.26 s. Calculate the force the seat belt exerts on a passenger in the car to bring him to a halt. The mass of the passenger is 70 kg.
ANSWER:
Solution 8PE
The impulse of a force is equal to the change in momentum. In other words, the rate of change of momentum is equal to the force. From the data given, we are required to calculate the force exerted by the seat belt on the passenger.
Step 1 of 2
The initial speed of the car m/s
The car stops, hence the final speed of the car
Time taken to stop the car s
The mass of the passenger kg
The change in momentum of the man kgm/s
kgm/s
The rate of change of momentum kgm/s X 1/s
N