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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 Carnot engine absorbs 950J of heat each cycle and provides 340J of work. How much heat is rejected each cycle
You throw a ball toward a wall at speed 20 m/s and at angle theta=60 degrees above the horizontal. What is the angle when it hits the wall
David is driving a steady 26 when he passes Tina, who is sitting in her car at rest. Tina begins to accelerate at a steady 2.8 at instant when David passes.
The wingspan (tip-to-tip) of a Boeing 747 jetliner is 59 m. The plane is flying horizontally at a speed of 220 m/s. Find the emf induced between the wing tips
A 0.280 kg ball is dropped from rest at a point 1.35m above the floor. The ball rebounds straight upward to a height of 0.780 m. What are the magnitude and direction of impulse of the net force applied to the ball during the collision with the flo..
Two fun-loving otters are sliding toward each other on a muddy (and hence frictionless) horizontal surface. One of them, of mass 8.00kg, How much mechanical energy dissipates during this play
a small electric immersion heater is used to heat 100 g of water for a cup of herbal tea. the heater is labeled 200
Suppose you put five electrons into a 0.30nm -wide one-dimensional rigid box (i.e., an infinite potential well). What is the ground-state energy
Mary Healy, the young woman with severe vaginal bleeding, is admitted to emergency room. She is three months pregnant, and physician is concerned about the volume of the blood she is losing.
what is the needed magnitude of the minimum acceleration.
A fuel leak is discovered at this point, and crew calculates that the plane can safely fly no more than 170 km before an emergency landing should be attempted. The only appropriate location for an emergency landing is 100 km north of their current po..
Speakers A and B are vibrating in phase. They are directly facing each other, are 8.0 m apart, and are each playing a 76.0-Hz tone. The speed of sound is 343 m/s. On the line between the speakers there are three points where constructive interfere..
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