A 1200 kg car is traveling at 3.00 m/s and strikes a wall. The 1200 kg car bounces off the wall with a velocity of 4.00 m/s. If the contact with the wall by the car lasts for 0.10 seconds, then the average force on the car is
A. 46,000 N.
B. 55,000 N.
C. 63,000 N.
D. 75,000 N.
E. 84,000 N.
E. 84,000 N.
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A runner runs on a circular path of radius 10 m. What is the magnitude of the displacement of the jogger if he runs
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A car travels in a flat circle of radius R. At a certain instant the velocity of the car is 20 m/s north, and the total acceleration of the car is 2.5 m/s2 37° south of west. Which of the following is correct?
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