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Q. A 50.0-kg ballet dancer stands on her toes during a performance with four square inches (26.0 cm2) in contact with the floor. What is the pressure exerted by the floor over the area of contact (a) if the dancer is stationary and (b) if the dancer is leaping upwards with an acceleration of 4.00 m/s2?

Q. During an Apollo lunar landing mission, the command module continued to orbit the Moon at an altitude of about 100 km. How much time did it take to go around the Moon once? Give your answer in seconds, do not enter units.

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