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A railroad car with a mass of 25,000 kg rolls into a second stationary car with a mass of 50,000 kg. The cars latch together and move off with a speed of 1.5 m/s. How fast was the first car moving before the collision? show all work.
Assume that the partner moves on a circle that has a radius of 6.50 m. At a swinging speed of 4.45 m/s, what force must the man apply to his partner in the straight-down position?
To simulate gravitation effects in space, you design a large cylindrical space station with a radius of 200m. Calculate the Rotational Kinetic Energy of the Station
A grinding wheel is a uniform cylinder with a radius of 8.5 cm and a mass of .580 kg. Calculate its moment of inertia about its center
A 1000 watt hair dryer is connected to 120 V source. Find the current drawn by the hair dryer
An ideal refrigerator utilizes a Carnot cycle operating between 0 degree C and 26 degree C. How much energy must be supplied to the refrigerator
According to highly accurate GPS-measurements , the continent of North America is drifting with a speed of 1cm/year. estimate the kinetic energy the continental US has
At t = 0 it is known that of 1000 neutrons in a one-dimensional box of width 10-5 cm, 100 have energy 4E1, How many neutrons are in the left half of the box
A hot wheels track has a spring loaded launcher. A 100g car is pushed into the launcher, which compresses the spring by 2cm. The cars initial velocity after launching is 3m/s.
A spring has a spring constant of 40N/m. How much work is required to stretch the spring 3.5cm from its equilibrium position
A ship has a mass of 40000 kg. its energy gives it an acceleration of 0.27 m/s while it travels a distance of 105 meters from rest. what force does the engine exert on the ship.
You are testing a new amusement park roller coaster with an empty car with mass 123 kg. One part of the track is a vertical loop with radius 11.1 m, how much work is done by the friction
The x-position of a particle is given by the expression x(t)=(4.0 m)cos(4.0?t+ 5.0?) , where x is in meters and t is in seconds. What is the maximum velocity of the particle
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