Question

Kramer goes bowling and decides to employ the force of gravity to "pick up a spare." He rolls the 8.00 kg bowling ball very slowly so that it comes to rest a center-to-center distance of 0.115 m from the one remaining 2.25 kg bowling pin. Treat both the ball and the pin as point objects, and determine the magnitude of the force of gravity Fray between them. ligravl = Treat both the ball and the pin as extended objects with the gravitational forces acting at their centers of mass. Select the option that correctly explains the efficacy of Kramer's technique. Even though the bowling ball and pin exert gravitational forces on each other that are equal in magnitude, the technique is effective because the bowling pin falls easily due to its low mass. The technique is ineffective because the torque produced by the gravitational force from the bowling ball is not large enough to overcome that produced by gravitational force from the Earth. The technique is effective because the more massive bowling ball exerts a stronger gravitational force on the bowling pin than the pin exerts on the ball. The technique is ineffective because the gravitational forces that the bowling ball and bowling pin exert on each other have the same magnitude but opposite sign, and therefore cancel.

Answer 1

Force, F = G m1 m2/r^2

F = 6.67 x 10^-11 x 8 x 2.25/0.115^2

F = 9.08 x 10^-8 N

Option (1) is correct

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