I Review | Constants The gravitational attraction between two objects with masses m1 and m2, separated by distance æ, is F = Gmm2/a?, where G is the gravitational constant. Part A How much work is done by gravity when the separation changes from æj to r2 ? Assume a2 < x . Express your answer in terms of the variables a1, r2, m1, m2, and G. > View Available Hintis) Gm m2 Gm m2 W = Submit Previous Answers v Correct • Part B If one mass is much greater than the other, the larger mass stays essentially at rest while the smaller mass moves toward it. Suppose a 1.5x 1013 kg comet is passing the orbit of Mars, heading straight for the 1.99x 1030 kg sun at a speed of 3.3 x 10 m/s. What will its speed be when it crosses the orbit of Mercury? The orbit of Mars is 2.28x 108 km, the orbit of Mercury is 5.79x 107 km, and G = 6.67x 10-11 N . m² /kg?. Express your answer with the appropriate units.

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If one mass is much greater than the other, the larger mass stays essentially at rest while the smaller mass moves toward it. Suppose a 1.5×1013 kg comet is passing the orbit of Mars, heading straight for the 1.99×1030 kg sun at a speed of 3.3 ×104 m/s. What will its speed be when it crosses the orbit of Mercury? The orbit of Mars is 2.28×108 km, the orbit of Mercury is 5.79×107 km, and G = 6.67×10-11 N⋅m2/kg2.

I Review | Constants
The gravitational attraction between two objects with masses m1
and m2, separated by distance x, is F = Gm1m2/x², where
G is the gravitational constant.
Part A
▼
How much work is done by gravity when the separation changes from x1 to x2? Assume x2 < x1.
Express your answer in terms of the variables x1 , x2, m1, m2, and G.
• View Available Hint(s)
Gm¡m2
Gmīm2
%3D
X 2
Submit
Previous Answers
Correct
Part B
If one mass is much greater than the other, the larger mass stays essentially at rest while the smaller mass moves toward it. Suppose a 1.5x1013 kg
comet is passing the orbit of Mars, heading straight for the 1.99×1030 kg sun at a speed of 3.3 × 104 m/s. What will its speed be when it crosses the orbit
of Mercury? The orbit of Mars is 2.28× 108 km, the orbit of Mercury is 5.79×107 km, and G = 6.67x10-11 N · m² /kg².
Express your answer with the appropriate units.
Transcribed Image Text:I Review | Constants The gravitational attraction between two objects with masses m1 and m2, separated by distance x, is F = Gm1m2/x², where G is the gravitational constant. Part A ▼ How much work is done by gravity when the separation changes from x1 to x2? Assume x2 < x1. Express your answer in terms of the variables x1 , x2, m1, m2, and G. • View Available Hint(s) Gm¡m2 Gmīm2 %3D X 2 Submit Previous Answers Correct Part B If one mass is much greater than the other, the larger mass stays essentially at rest while the smaller mass moves toward it. Suppose a 1.5x1013 kg comet is passing the orbit of Mars, heading straight for the 1.99×1030 kg sun at a speed of 3.3 × 104 m/s. What will its speed be when it crosses the orbit of Mercury? The orbit of Mars is 2.28× 108 km, the orbit of Mercury is 5.79×107 km, and G = 6.67x10-11 N · m² /kg². Express your answer with the appropriate units.
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