2) a sphere sits at rest 250 atop a ramp. The sphere ralls to the bottom. Sphere M= 1.2Kg R= 20 cm a) whot is the Bun rotahional speed of bottom of the ramp? Use Cons v. of Energu The & sphere at the b) How much time does the sphere take to rol down The ramp? at speed Uo= 6m/% The cart has a mass of 40kg and it isfilled with 80 Kq of sand. The cart moves frictionless ly down atrack, a) Please de rive the equertion for UF(t) for the Cort as the sand leaks aut a hole m its botom. A cart is moving b) what is the maximum speed!