Question

(A) Two cars are parked across a street from each other. One car has a mass of 1.57×103 kg and the second car has a mass of 1.31×103 kg. The attraction force between the two cars is 4.47×10-6 N. What is the distance between the two cars?

5.54 m

0.00386 m

15.3 m

0.140 m

(B) A planet has a diameter of 5.97×106 m and the free fall acceleration on this planet is 7.91 m/s2. What is the mass of this planet?

1.06×1024 kg

3.54×1017 kg

4.23×1024 kg

7.08×1017 kg

(C) If an astronaut on Earth can throw a ball straight up to a height of 11.8 m, how high could he throw it on Mars? Take the mass of Mars to be 6.42×1023 kg and the radius of Mars to be 3.37×106 m.

9.10×10-6 m

11.8 m

2.02 m

30.7 m

Answer 1