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Q. If you are in a car accident with an initial speed of 119 km/h and you are stopped by an airbag that inflates from the dashboard, over what distance must the airbag stop you for you to survive the crash?

Q. Zero, a hypothetical planet, has a mass of 1.0 x10^23 kg, a radius of 3.0 x10^6 m, and no atmosphere. A 13 kg space probe is to be launched vertically from its surface.

(a) If the probe is launched with an initial kinetic energy of 5.0 x10^7 J, what will be its kinetic energy when it is 4.0 x10^6 m from the center of Zero?

(b) If the probe is to achieve a maximum distance of 8.0 x10^6 m from the center of Zero, with what initial kinetic energy must it be launched from the surface of Zero?

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