Question

1. A 55.0 kg person rides in an elevator while standing on a scale. The elevator is traveling downward but slowing down at a rate of 1.5 m/s^2. The reading on the scale is closest to...

2. A batter hits a 130-gramm baseball that was approaching him horizontally at 45.0 m/s and, as a result, the ball leaves the bat at 45.0 m/s in the direction of the pitcher. What is the magnitude of the impulse delivered to the baseball?

3. How much work is needed to be done to change the speed of a 1200 kg sport utility vehicle from 55 m/s to 45 m/s?

4. A planet has two small satellites in circular orbits around the planet. The first satellite has a period of 3.0 hours and an orbital radius of 10000 km. The second satellite has an orbital radius 8500000 m. What is the period of the second satellite?

Answer 1

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