What is the decrease in kinetic energy after collision
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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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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What is the maximum speed with which a 1180 kg car can round a turn of radius 75 m on a flat road if the coefficient of static friction between tires and road is 0.80?
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
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A gas is compressed at a constant pressure of 0.836 atm from 6.34 L to 4.3 L. In the process, 550 J of energy leaves the gas by heat. What is the work done on the gas?
Two lifeguards pull on ropes attached to a raft. If they pull in the same direction, the raft experiences a net external force of 320 N to the right. If they pull in opposite directions, the raft experiences a net external force of 109 N to the l
A small ball of mass 81 g is suspended from a string of length 26 cm and whirled in a circle lying in the horizontal plane. If the string makes an angle of 23? with the vertical, find the centripetal force experienced by the ball. The acceleratio
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