Do the rider and bicycle have energy while coasting down the hill? if so, explain.
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Ответ:
The bicycle and the person on it are in motion. therefore anything is motion has energy.
Ответ:
15m 55d E of N = 15 sin 55, 15 cos 55 N
Sum= (15sin55)m E, (-12 + 15 cos 55)m N