physic物理问题英文a car is driving up a straight hill at a constan
physic物理问题英文
a car is driving up a straight hill at a constant speed of 50 kilometers per hour.Is the net force on the car zero?A second car is driving over the crest of the hill at a constant speed of 50 miles per hour.I the net force on the car zero?
a car is driving up a straight hill at a constant speed of 50 kilometers per hour.Is the net force on the car zero?A second car is driving over the crest of the hill at a constant speed of 50 miles per hour.I the net force on the car zero?
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