Cart has a mass of 30 kg. Block A has a mass of 20 kg. No friction between the cart and the ground. Friction coefficients between the cart and block are: μs = 0.35 and μk = 0.30. a-) Determine whether the block will slide or not. b-) If the block slides, then calculate the time required for the block to displace on the cart for 1.5 m.