Version .a bowling alley, the ball feeder must exert a force to push the bowling

Question

Version .a bowling alley, the ball feeder must exert a force to push the bowling balls up a 1 m long ramp. 6. Ar as in the figure. The ramp leads the balls to a chute 0.5 m above the base of the ramp. Approximately how much force, in N, must be exerted on a 5 kg bowling bal? a. 200 b. 50 c. 25 d. 5 e. Can't tell 0.5 m 7. A student drops two ball bearings, one twice the mass of the other, from the roof of Tiernan Hall. The friction is insignificant. Just before hitting the ground, the heavier ball compared to the lighter one has an amount of kinetic energy a- The same b. Twice as much c. Half d. Four times e. Can't tell

Explanation / Answer

a) let's find the angle of ramp= sin^-1 (0.5/1) =30 degree

F= mgsin theta ( with out friction) = 5 (9.8) sin 30 =24.5 or 25 N

b)velocity just before the hitting the ground will be same for both the masses

KE for heavier mass = 1/2 ( m) v^2, ....KE for lighter mass = 1/2 ( m/2)v^2= m/4v^2

kE for lighter mass will be half

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