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

omit Question 1  Two masses, 3 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? 3 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? 7 kgboth masses experience the same gravitational force of attraction3 kg omit Question 3  When initially released, which mass weighed more in the earth's gravitational field? 7 kg3 kg both masses weighed the same omit Question 4  If when both masses impact the earth their centers land 3.108 meters apart, what is the gravitational force exerted on the small mass by the larger mass? 1.45 x 10-10 N2.76 x 10-11 N6.91 x 10-11 N1.61 x 10-11 N omit Question 5  On the surface of Planet X a 42-kg mass weighs 960.4 N. What is the local value of Planet X's gravitational field strength? 13.1 N/kg22.9 N/kg98.0 N/kg0.044 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. 1.34 x 1027 kg2.56 x 1024 kg1.4 x 1025 kg1.37 x 1026 kg omit Question 7  If the 42-kg mass is moved to a position which is 7.4 radii above the surface of Planet X, how will its weight be affected? its weight will be increased by a factor of 5476 / 100its weight will be increased by a factor of 74 / 10its weight will be decreased by a factor of 100 / 5476its weight will be decreased by a factor of 10 / 74 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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