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

omit Question 1  Two masses, 2 kg and 7 kg, initially at rest, are both released and fall freely to the ground. Which mass would experience the greater acceleration while falling? 2 kg7 kgboth masses experience the same acceleration 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 attraction7 kg2 kg omit Question 3  When initially released, which mass weighed more in the earth's gravitational field? 2 kg both masses weighed the same7 kg omit Question 4  If when both masses impact the earth their centers land 1.938 meters apart, what is the gravitational force exerted on the small mass by the larger mass? 6.22 x 10-11 N2.49 x 10-10 N1.6 x 10-10 N8.88 x 10-11 N omit Question 5  On the surface of Planet X a 38-kg mass weighs 1303.4 N. What is the local value of Planet X's gravitational field strength? 133.0 N/kg34.3 N/kg24.5 N/kg0.029 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. 2.05 x 1026 kg2.09 x 1025 kg2.01 x 1027 kg1.71 x 1024 kg omit Question 7  If the 38-kg mass is moved to a position which is 5.1 radii above the surface of Planet X, how will its weight be affected? its weight will be decreased by a factor of 100 / 2601its weight will be increased by a factor of 51 / 10its weight will be decreased by a factor of 10 / 51its weight will be increased by a factor of 2601 / 100 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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