What is the force exerted by the scale
A 63.0 kg girl weighs herself by standing on a scale in an elevator. What is the force exerted by the scale when the elevator is descending at a constant speed of 10 m/s?
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An object weighing 300 N in air is immersed in water after being tied to a string connected to a balance. The scale now reads 265 N. Immersed in oil, the object appears to weigh 275 N. Find (a) the density of the object and (b) the density of the
A railroad car with a mass of 2.00 * 10^4kg is moving at 3.00m/s, each with the same mass as the single car and initially moving in the same direction at 1.2 m/s. what is the decrease in kinetic energy after the collision?
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