Answer to Question #52298 in Other Physics for john

Question #52298
7. An 80-kg man and his car are suddenly accelerated from rest to a speed of 5 m/s as a result of a rear-end collision. Assuming the time taken to be 0.3s, find: a) the impulse on the man and b) the average force exerted on him by the back seat of his car. 8. An airplane propeller is rotating at 1900 rev/min. a. Compute the propeller's angular velocity in rad/s. b. How long in seconds does it take for the propeller to turn through 30.0 degrees? 9. A disk with a 1.0-m radius reaches a maximum angular speed of 18 rad/s before it stops 30 revolutions after attaining the maximum speed. How long did it take the disk to stop?
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