e. A jewelry box is placed on the dashboard of a car and slides forward when the car decelerates from 20m/s to rest in 4.0 seconds, but not if the deceleration is a little bit longer. Find the coefficient of static friction between the box and the dashboard.
Two blocks are connected via a pulley, both blocks have a mass of 10.kg. One block rests on a horizontal surface and the other one hangs freely by a cord which passes over a pulley. Assume the cord does not stretch, ignore mass of pulley and cord, therefore acceleration is the same for both blocks and tension is the same for both blocks. The hanging block moves down so the block lying on the horizontal surface moves to the right.
e. A jewelry box is placed on the dashboard of a car and slides forward when the car decelerates from 20m/s to rest in 4.0 seconds, but not if the deceleration is a little bit longer. Find the coefficient of static friction between the box and the dashboard.
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