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A railroad Diesel engine weighs 4 times as much as a freight car. If the Diesel engine coasts at a 5 km/h into a freight car that is at rest show that the speed of the coupled car is 4 km/h.
your car engine just died. your were moving rightward at 25 m/s, but your car slows to a rest in a distance of 120 m. what net average force was exerted on the car
A prospector finds a solid rock composed of granite (? = 2650 kg/m3) and gold. The volume of the rock is 3.40 10-4 m3 and its mass is 3.87 kg. a) What mass of gold is in the rock? b) What percentage of the rock is gold by volume? c) What percentag..
The world's fastest humans can reach speeds of about 11 m/s. In order to increase his gravitational potential energy by an amount equal to his kinetic energy at full speed, how high would such a sprinter need to climb?
a television antenna is on the roof of the building. from a pt. on the ground 36.0 feet from the building the angle of
A student is running at her top speed of 5.2m/s to catch a bus, which is stopped at the bus stop. For what time does she have to run in that case
A person's body is covered with 1.69 m2 of wool clothing. The thickness of the wool is 2.12 × 10-3 m. How much heat per second does the person lose due to conduction
a modern day archimedes finds the weight of the kings gold crown to be 60.21 n. when suspended by a light thread and
a chain of mass m forming a circle of radius r is slipped on a smooth round cone with half-angle theta. find the
A positive charge of 0.800? C is located in a uniform field of 9.00×104 N/C. How close are the two charges
One of Saturn's moons has an orbital distance of 1.87 x 108 m. estimate a mass for the planet Saturn
q1. an electron librated from a hot filament cathode is attracted by an anode with a potential of 1200v positive with
A car is traveling along a straight road at a velocity of +27.3 m/s when its engine cuts out. For the next 2.57 seconds, the car slows down, and its average acceleration is . For the next 4.47 seconds, the car slows down further, and its average a..
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