Two objects one having three times the mass of the other, are dropped from the same height in a vacuum. At the end of their fall, their velocities are equal because: OA) anything falling in vacuum has constant velocity OB) all objects reach the same terminal velocity OC) the acceleration of the larger object is three times greater than that of the smaller object OD) the force of gravity is the same for both objects El none of the above

8. (Physics) A ball of mass m is tossed upward from a building at height h with initial velocity v. The only force acting on the ball is the force of gravity, F = -mg, where g is the acceleration due to gravity. Let x = r(t) denote the height above ground level at time t. By Newton's second law the initial value problem is mx" = -mg, x(0) = h, x'(0) = v.

Determine the velocity of the 79-lb block A if the two blocks are released from rest and the 38-lb block B moves 2 ft up the incline. The coefficient of kinetic friction between both blocks and the inclined planes is μk = 0.10.(Figure 1)Express your answer with the appropriate units. THE ANSWER IS NOT 2.8653 ft/s !! THE LAST GUY WAS WRONG!

A basketball player jumps straight up for a ball. To do this he lowers his body 0.28 m then accelerates through this distance b forcelly straightening his legs. This player leaves the floor with a vertical velocity sufficient to carry him 0.92 m above the floor. For this problem use a coordinate system where up is positive. A) Calculate his velocity when he leaves the floor in m/s B) Calculate his acceleration in m/s2, while he is straightening his legs.He goes from zero to the velocity found in part(a) in a distance of 0.28 m C) Calculate the magnitude of the force he exerts on the floor to do this, in newtons, given that his mass is 112kg