A cardinal richmondena cardinalis of mass 3.80times10-2 kg, Ask an Expert

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Q. A block of mass mblock = 2 kg rests on a cart of mass mcart = 3.6 kg, which moves without friction on a horizontal surface. The coefficient of static friction between the block and the cart is µ = 0.71. The cart is accelerating to the right.

What is the maximum acceleration such that the block does not slide on the cart?

Q. A cardinal (Richmondena cardinalis) of mass 3.80×10-2 kg and a baseball of mass 0.146 kg have the same kinetic energy. What is the ratio of the cardinal's magnitude p_c of momentum to the magnitude p_b of the baseball's momentum?

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