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A ball is thrown directly downward with an initial speed of 6.95 m/s, from a height of 28.5 m. After what interval does the ball strike the ground?
Then find the force between them as a function of distance h. describe why the sign of the force does (or does not) make sense to you.
A man strikes a nail with a 1kg hammer. The speed of the hammer just before it strikes the nail is 5m/s, What is the force exerted on the nail by the hammer
A neon sign at the Catskellar requires 12,000 V to operate which is supplied by a transformer. If the primary draws 0.5 A, how much current is suppplied to the neon sign
It is 156 cm from your eyes to your toes. You're standing 212 cm in front of a tall mirror. How far is it from your eyes to the image of your toes
a 2.90 x 10 2 n force is pulling an 75.0-kg refrigerator across a horizontal surface. the force acts at an angle of
A vessel at rest at the origin of an xy coordinate system explodes into three pieces. Just after the explosion, one piece, of mass m, What is the direction of the third piece just after the explosion
Air at 80 kPa, 27 degrees C and 220 m/s eneters a diffuser at a rate of 2.5 kg/s and leaves at 42 degrees C. the exit area of the diffuser is 400 cm2. the air is estimated to lose heat at a rate of 18 kJ/s during this process.
A bicycle is turned upside down while its owner repairs a flat tire on the rear wheel. A friend spins the front wheel, of radius 0.386 m, and observes that drops of water fly off tangentially in an upward direction, find the magnitude of the averag..
The starter motor of a car engine draws a current of 200 A from the battery. The copper wire to the motor is 4.90 mm in diameter and 1.2 m long, How much charge passes through the starter motor
If one shines a laser with wavelength ? = 650 nm through a single slit of width a = 0.04 mm, How far apart are the minima
at a certain time a particle had a speed of 70 ms in the positive x direction and 1.2 s later its speed was 39 ms in
A tennis ball of mass 0.0611 kg is served. It strikes the ground with a velocity of 55.6 m/s (124 mi/h) at an angle of 21.2° below the horizontal. what average force did the ground exert on the ball
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