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During the pitching motion, a baseball pitcher exerts an average horizontal force of 274 Newton against the 0.158 kilogram baseball while moving it through a horizontal displacement of 1.3 meter before releasing it. Initial ball velocity was zero. At release find what was the velocity of the ball?
Place a 2kg textbook against a vertical wall and press on it with a force of 40 N. determine the acceleration of the textbook
a man with a mass of 80.0 kg is out fishing with his daughter who has a mass of 35.0 kg. they are initially sitting at
A step-down transformer is used for recharging the batteries ofportable devices. The turns ratioN2/N1 for a particulartransformer used in a CD player is 9:12. Whenused with 120 V (rms) household service, the transformer draws anrms current of 450 ..
a metal rod a and a metal sphere b on insulating stands touch each other they are originally neutral. a positively
A 2720 - ? resistor and a 1.8 - ?F capacitor are connected in series across a generator (60.0 Hz, 120 V). Determine the power delivered to the circuit
A 1.35 block is attached to a spring with spring constant 14. While the block is sitting at rest, a student hits it with a hammer and almost instantaneously gives it a speed of 50. What are The block's speed at the point where = 0.750 A.
a bullet is moving at a speed of 367 ms when it embeds into a lump of moist clay. the bullet penetrates for a distance
A 120 gcube of ice at 0°C is dropped into 1.0 kg of water that wasoriginally at 86°C. What is the final temperature of the water after the ice has melted
A 0.621-kg basketball is dropped out of a window that is 5.26 m above the ground. How much work is done on the ball by its weight
A long solenoid that has 1,105 turns uniformly distributed over a length of 0.452 m produces a magnetic field of magnitude 1.00 10-4 T at its center
a speedboat starts from rest and accelerates at 2.01 ms2 for 7.35 s. at the end of this time the boat continues for an
A 140 ? lamp, a 25 ? electric heater, and a 57 ? fan are connected in parallel across a 137 V line. What is the current of the lamp
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