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A 9400 kg boxcar traveling at 16 m/s strikes a second boxcar at rest. The two sticktogether and move off with a speed of 8.0m/s. What is the mass of the second car?
kg
A roller coaster car of mass 250 kg has a speed of vo = 12 m/s at point A, located at a height of h = 15 m. find the speed of the car when it reaches point B. use energy ideas
What is the frictional force
Children sled down a 44m -long hill inclined at 23 degrees. At the bottom, the slope levels out. how far do the children slide on the level ground
The men's world record for the shot put, 23.12 m, was set by Randy Barnes of the United States on May 20; 1990.If the shot was launched from 6 ft above the ground at an initial angle of 42degrees, what was its initial speed.
The equipotential surfaces associated with an isolated point charge are:
An object (3.7kg) is lifted 4.6 m above the ground and thendropped to the ground. What is the object's Pe at the top ofthe lift, How much work did gravity do on the object
Two particles are moving along the x axis. Particle 1 has a mass m1 and a velocity v1 = +3.7 m/s. Find the ratio m1/m2 of the masses of the particles
The maximum speed of a child on a swing is 4.62 m/s. How high above the ground is he at his highest point
A two-slit pattern is viewed on a screen 1.28 m from the slits. If the two third-order maxima are 39.6 cm apart, what is the total width of the central bright fringe
a particle with speed v0 and impact parameter b starts far away from a planet of mass m. a. starting from scratch find
A liter of water has a mass of 1 kg and the mass of a water molecule is 18 amu. How many molecules of water are there in 2 L of water
Consider a charge of +1 nC (nanocoulombs, or Coulombs ×10?9) at (-3, -4) m, and a charge of -2 nC at (12, -5). Calculate the electric field strength at the origin
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