Directions: On this worksheet you will examine the properties of gravitational forces and fields.

omit Question 1  Two masses, 4 kg and 9 kg, initially at rest, are both released and fall freely to the ground. Which mass would experience the greater acceleration while falling? both masses experience the same acceleration4 kg9 kg omit Question 2  When initially released, which mass experienced the greater gravitational force of attraction to the earth? both masses experience the same gravitational force of attraction9 kg4 kg omit Question 3  When initially released, which mass weighed more in the earth's gravitational field? 4 kg both masses weighed the same9 kg omit Question 4  If when both masses impact the earth their centers land 3.096 meters apart, what is the gravitational force exerted on the small mass by the larger mass? 1.57 x 10-11 N2.51 x 10-10 N9.05 x 10-11 N3.48 x 10-11 N omit Question 5  On the surface of Planet X a 43-kg mass weighs 948.2 N. What is the local value of Planet X's gravitational field strength? 22.1 N/kg0.045 N/kg96.7 N/kg12.3 N/kg omit Question 6  If Planet X has the same radius as the Earth, what is the mass of Planet X? If needed, the mass of the Earth is 5.98 x 1024 kg. 1.32 x 1026 kg1.29 x 1027 kg1.35 x 1025 kg2.66 x 1024 kg omit Question 7  If the 43-kg mass is moved to a position which is 7.2 radii above the surface of Planet X, how will its weight be affected? its weight will be decreased by a factor of 100 / 5184its weight will be increased by a factor of 72 / 10its weight will be increased by a factor of 5184 / 100its weight will be decreased by a factor of 10 / 72 omit Question 8  When released from rest an object in freefall and tracked by a motion detector, which of the following position-time graphs will be displayed? omit Question 9  When released from rest an object in freefall and tracked by a motion detector, which of the following velocity-time graphs will be displayed?

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