1. At NASA\'s Zero Gravity Research Facility in Cleveland, Ohio, experimental pa
ID: 2262435 • Letter: 1
Question
1. At NASA's Zero Gravity Research Facility in Cleveland, Ohio, experimental payloads fall freely from rest in an evacuated vertical shaft through a distance of 132 m.
(a) If a particular payload has a mass of 31 kg, what is its potential energy relative to the bottom of the shaft?
(b) How fast will the payload be traveling when it reaches the bottom of the shaft?
Convert your answer to mph for a comparison to highway speeds.
2. A bicycle and rider going 11 m/s approach a hill. Their total mass is 62 kg.
(a) What is their kinetic energy?
(b) If the rider coasts up the hill without pedaling, how high above its starting level will the bicycle be when it finally rolls to a stop?
3. A 1,000-W motor powers a hoist used to lift cars at a service station.
(a) How much time would it take to raise a 1,300-kg car 3 m?
(b) If the original motor is replaced with one rated at 2,000 W, how long would it take to complete this task?
Explanation / Answer
1.a)40101.6 J
b)50.864 m/s=113.77 mph
2.a)3751 J
b)6.173 m
3.)38.22 seconds
b)19.11 seconds
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