prob_114

# prob_114 - 114 CONCEPT QUESTIONS a The gravitational force...

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114. CONCEPT QUESTIONS a. The gravitational force exerted on the rock is greater than that on the pebble, because the rock has the greater mass. b. The accelerations are equal, because all objects, regardless of their mass, fall to the earth with the same acceleration due to gravity. SOLUTION a. The magnitude of the gravitational force exerted on the rock by the earth is given by Equation 4.3 as () ( ) earth rock rock 2 earth 11 2 2 24 2 6 6.67 10 N m / kg 5.98 10 kg 5.0 kg 49 N 6.38 10 m Gm m F r = ×⋅ × == × The magnitude of the gravitational force exerted on the pebble by the earth is ( ) ( ) earth pebble pebble 2 earth 11 2 2 24 4 3 2 6 6.67 10 N m / kg 5.98 10 kg 3.0 10 kg 2.9 10 N 6.38 10 m Gm m F r −− = × × × × b. The acceleration of the rock is equal to the gravitational force exerted on the rock

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prob_114 - 114 CONCEPT QUESTIONS a The gravitational force...

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