Physics, 04.12.2019 10:31 joeylozier15
A25.0-kg child plays on a swing having support ropes that are 2.20 m long. her brother pulls her back until the ropes are 42.0° from the vertical and releases her from rest. (a) what is her potential energy just as she is released, compared with the potential energy at the bottom of the swing’s motion? (b) how fast will she be moving at the bottom? (c) how much work does the tension in the ropes do as she swings from the initial position to the bottom of the motion?
Answers: 3
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During a car accident, a 125kg driver is moving at 31m/s and in 1.5s is brought to rest by an inflating air bag. what is the magnitude of the change in momentum to the driver
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A25.0-kg child plays on a swing having support ropes that are 2.20 m long. her brother pulls her bac...
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