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A 0.12kg rubber ball is dropped from a height of 1.0m above the floor and it bounces back to a height of 0.80m .
How much energy is lost?
A cat runs along a straight line (the x-axis) from point A to point B to point C. The distance between points A and C is 5.00 m, distance between points B and C is 10.0 m, and the positive direction of x axis points to the right. The time to run f..
A tow truck pulls a car 5.2 km along a horizontal roadway using a cable having a tension of 790.
while Jo moves off in the opposite direction at a speed of 0.946m/s. assuming that friction is negligible, find out Al's mass.
A rope applies a horizontal force of 180N to pull a crate a distance of 2m across the floor A frictional force of 60N opposes this motion.
In the vertical case the maximum tension in the string is 18.0% larger than the tension that exists when the circle is horizontal. Identify the speed of the stone.
Radioactive isotopes frequently occur together in mixtures. Assume a 400g sample contains, with a half-life of 12 days, and, with a half-life of 4.5 days. If there are firstly twice as many calcium atoms as there are barium atoms, what will be the ra..
At 18°C, a rod is exactly 20 cm long on a steel ruler. Both the rod and the ruler are placed in an oven at 285°C, where the rod now measures 20.21 cm on the same ruler. What is the coefficient of linear expansion for the material of which the rod ..
A train is travelling up a 4.5 degree incline at a speed of 3.25 m/s when the last car breaks free and begins to coast without friction. a) How long does it take for the last car to come to rest momentarily? b) How far did the last car travel befo..
At a distance r away from a point charge q, the electric potential is V = 600 V and the magnitude of the electric field is E = 200 N/C
A gas expands from I to F. The energy added to the gas by heat is 418 J when the gas goes from I to F along the diagonal path. (a) What is the change in internal energy of gas? (b) How much energy must be added to the gas by heat for indirect path..
A 91kg water skier floating in a lake is pulled from rest to a speed of 12 m/s in a distance of 25 m.What is the net force exerted on the skier, suppose his acceleration is constant.
A block of mass 0.540 kg is pushed against the horizontal spring of negligible mass until the spring is compressed a distance x. The force constant of the spring is 450 N/m.
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