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Q. A 10-kg bullet is fired horizontally into a 300-g wooden block initially at res on a horizontal surface and become embedded in it. The coefficient of friction between block and surface is (0.50). The combined system slides 4-m before stopping. With what speed did the bullet strike the block?
A force vector points at an angle of 50.6° above the +x axis. It has a y component of +280 newtons. Calculate the magnitude of the force vector.
Two point charges, Q1 = -7 and Q2 = 2 are located between two oppositely charged parallel plates. The two charges are separated by a distance of x = 0.33m. Assume that the electric field produced by the charged plates is uniform and equal to E = 6..
A bumper car with mass m1 = 115kg is moving to the right with a velocity of v1 = 4 m/s. A second bumper car with mass m2 = 95 kg is moving to the left with a velocity of v2 = -3.7 m/s. The two cars have an elastic collision. Suppose the surface is fr..
A 240g ball and a 130g ball are connected by a 32 cm-long massless, rigid rod. The structure rotates about its center of mass at 150rpm.
Two large, parallel, conducting plates are 21cm apart and have charges of equal magnitude and opposite sign on their facing surfaces. An electrostatic force of 4.1 x10-15 N acts on an electron placed anywhere between the two plates.
An electric wire that has a mass of 5 kg for a 20m length is strung between two poles 20 m apart. What should be the tension in the wire if it is to take 0.8 seconds for a pulse to travel along the wire from one pole to the other.
minivan moving at 38 m/s passes an unmarked state police car moving at 24 m/s. The electromagnetic waves produced by the radar gun in the police car have the frequency of 8.25 × 10^9 Hz.
A new circus act is called the Texas Tumblers. Lovely Mary Belle swings from a trapeze, projects herself at an angle of 53, and is supposed to be caught by Joe Bob, whose hands are 6.10 above and 8.02 horizontally from her launch point. You can ignor..
Suppose the speed of light in a vacuum were only 25.5 mi/h. Find the length of the bicycle being ridden at a speed of 20.0 mi/h as measured by an observer sitting on the park bench, given that its proper length is 1.59 m.
A suitcase weighing 228N is at rest on the floor of a hotel lobby. The co-efficient of static friction between the suitcase and the floor is 0.49, and the coefficient of kinetic friction is 0.313. With what least amount horizontal force must a bel..
Legend has it that, many centuries ago, Archimedes jumped out of his bathtub and ran across town naked screaming "Eureka!" after he solved an especially difficult problem.
A race car can be slowed with a steady acceleration of -11 m/s2 if the car is going 55m/s how many meters would it travel before it stops?
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