2. A railway car on a horizontal frictionless track initially has mass m and speed vo. Sand is then dropped vertically downward onto the car, starting from rest at a vertical height h. The sand hits the card at a constant rate u (mass/time). Assume that when the sand hits the cart, the sand instantaneously comes to rest relative to the cart. If the sand starts hitting the cart at t = 0, find the velocity of the cart as a function of time.

Q3 please again

no. 2 e

I watched a lot of Looney Toons when I was a kid, and liked that the Roadrunners legs would spin for a second or two before their claws caught traction. a. With a coefficient of kinetic friction 0.2 what acceleration will the roadrunner experience while their feet are sliding accross the ground? b. How far forward will the roadrunner drift in a half second, starting from rest under this acceleration? c. After catching traction the Roadrunner accelerates away, travelling 10 m to get offscreen in one fifth of a second. What was their coefficient of static friction?