4. Two objects are known to have the same kinetic energy. Do these two objects necessarily have the same momentum?Explain, and give a specific example.6.A system of particles is known to have zero momentum. Does it follow that the kinetic energy of the system is also zero? Explain.10. Your car rolls slowly in a parking lot and bangs into the metal base of a light pole. In terms of safety, is it better for your collision with the light pole to be elastic or inelastic? Explain.13. On a calm day you connect an electric fan to a battery on your sailboat and generate a breeze. Can the wind produced by the fan be used to power the sailboat? Explain.14. In the previous question, can you use the wind generated by the fan to move a boat that has no sail? Explain why or why not.32. A juggler performs a series of tricks with three bowling balls while standing on a bathroom scale. Is the average reading of the scale greater than, less than, or equal to the weight of the juggler plus the weight of the three balls? Explain.

熱心網(wǎng)友

這么多英文，麻煩樓主翻譯成中文，我想做也做不了！嗚嗚嗚嗚嗚！