A block is placed against the vertical front of a cart as shown in the figure. The coefficient of static friction between the block and the cart is μs. What acceleration must the cart have in order that block A does not fall?
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A 9.5-kg block is sliding down a wall with constant velocity. The coefficient of static friction between the block and the wall is μs = 0.70. The coefficient of kinetic friction between the block and the wall is μk = 0.40. What is the magnitude of the force (in N) pressing the block against the wall? Use g = 9.79 m/s2.
A contestant in a winter sporting event pushes a 45.0-kg block of ice across a frozen lake as shown in the figure. Gine the coefficient of static friction to be μs = 0.1, and the coefficient of kinetic friction to be μk = 0.03
(a) Calculate the minimum force F he must exert to get the block moving.
(b) What is the magnitude of its acceleration once it starts to move if that force is maintained?
A traveler pushes a loaded luggage cart along a straight line in anairport. She pushes the cart along the line of the cart's motion,and the cart is moving at a constant velocity 0.5 m/s. The totalmass of the cart and luggage is 45 kg.(a) If there is no friction between the cart and and airport floor,how much force is she applying on the cart?1Your answer is correct. N(b) If the static friction coefficient s = 0.6 and the kineticfriction coefficient k = 0.5 between the cart and the airportfloor, how much force is she applying on the cart?2 N(c) For the same friction coefficients (s = 0.6 and k = 0.5), whatis the power dissipated by the friction?
