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? 7 kg3 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 attraction3 kg7 kg omit Question 3  When initially released, which mass weighed more in the earth's gravitational field? 7 kg both masses weighed the same3 kg omit Question 4  If when both masses impact the earth their centers land 2.376 meters apart, what is the gravitational force exerted on the small mass by the larger mass? 2.76 x 10-11 N2.48 x 10-10 N4.73 x 10-11 N1.18 x 10-10 N omit Question 5  On the surface of Planet X a 33-kg mass weighs 754.6 N. What is the local value of Planet X's gravitational field strength? 22.9 N/kg13.1 N/kg0.044 N/kg77.0 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. 1.4 x 1025 kg1.37 x 1026 kg2.56 x 1024 kg1.34 x 1027 kg omit Question 7  If the 33-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 5184 / 100its weight will be increased by a factor of 72 / 10its 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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