If a roller coaster car with a mass of 105 kg is traveling at 2.5 m/s at the top of a hill that is 35 meters high, how fast will it be traveling when it is 5.0 meters high?

The answer is trial 3.

Two cars collide, lock bumpers and move together after the collision.this collision is known as perfectly inelastic collision.

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Distance covered = speed x timethe distance traveled going against the stream = distance traveled with the stream.therefore it is the speed and the time that are the variables.as he travels the same distance both ways, speed x time is the same for each way.going upstream his speed is 4 kph; going downstream his speed is 6 kph.therefore we have two simultaneous equations: time upstream x 4 = time downstream x 6time upstream + time downstream = 60 minutestherefore we have the equation: time upstream = 6/10 hour, time downstream therefore = 4/10 hour.distance traveled at 4km/hr in 6/10 hour = 24/10 = 2.4km.check: distance traveled at 6km/hr in 4/10 hour = 24/10 = 2.4km.