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When a quarterback throws a quick pass, he pushes on the ball with constant horizontal force for 0.10 sec, while his hand moves forward 0.80 m. Assume the mass of the ball is 0.90 Kg. Find:
a.) the acceleration of the ball.
b.) the force exerted on the ball.
c.) the work done on the ball by the quarter back.
d.) the power developed by the quarterback while throwing the ball.
A 0.362 kg bead slides on a curved wire, starting from rest at point A, find the speed of the bead at C
A system does 167 J of work on its environment and gains 85.5 J of heat in the process, Find the change in the internal energy of the environment
A 23-g bullet traveling 270m/s penetrates a 2.2kgblock of wood and emerges cleanly at 215m/s. how fast does it move after the bullet emerges
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 typical capacitor in an MP3 player has C = 5 ?F. If a charge ±37 ?C is placed on the plates, what is the voltage across the capacitor?
A baseball is thrown from the roof of 20.4m -tall building with an initial velocity of magnitude 13.9m/s, What is the speed of the ball just before it strikes the ground
A 20-kg sled is pushed up a 34° slope to a vertical height of 140 m. A constant friction force of 50 N acts for the entire distance. What external work was required
A rocket has an initial mass of 28,000 kg, of which 20 percent is the payload. It burns fuel at a rate of 185 kg/s and exhausts its gas at a relative speed of 1.8 km/s.
Two trains and a bird Two trains, each having a speed of 23km/h, are headed at each other on the equal straight track. A bird that can fly 60km/h flies off the front of one train when they are 70 km apart and heads directly for the other train.
After going through a bad break-up with your significant other you end up drinking half a case of beer. The next day you decide the cloud of despair must be fought with exercise. How much longer will it take you to burn off the calories of the bee..
explain the electric flux through the surface of the cube. Calculate the volume charge density of the atmosphere, assuming it to be uniform between 270 and 420 m.
A square loop of wire has sides of length 3 cm. A magnetic field points out of the screen; its magnitude is B = 3.0t2y, What is the emf around the square at t = 2.00 s
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