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A 140-kg crate is being pushed across a horizontal floor by a force P that makes an angle of 49.9 ° below the horizontal. The coefficient of kinetic friction is 0.274. What should be the magnitude of P, so that the net work done by it and the kinetic frictional force is zero?
A mass of 0.73 kilogram, attached to a spring with a spring constant of 43 N/m, is set into simple harmonic motion. Find the magnitude of the acceleration of the mass
A 200 gm meter stick has two objects attached to it, one of 100 gm at the 30 cm mark and the other of 300 gm at the 70 cm mark. At what mark on the meter stick is the center of gravity of the system?
a a cardinal richmondena cardinalis of mass 4.00times10-2 kg and a baseball of mass 0.140 kg have the same kinetic
A positive charge of q = 3.5 µC is pulled on by two negative charges. One, -2.0 µC, is 0.050 m to the north and the other, -4.0 µC, is d = 0.029 m to the south. What total force is exerted on the positive charge .
A proton initially at rest is accelerated by a uniform electric field. The proton moves 6.48 cm in 1.20 10-6 s. Find the voltage drop through which the proton moves
Marooned on a desert island and with a lot of time on your hands, you decide to disassemble your glasses to make a crude telescope with which you can scan the horizon for rescuers. Which lens should he use to view object
As monochromatic light passes from air to glass and back to air, changes are observed in its Wavelength and frequency. Wavelength, frequency, and speed. Frequency and speed.
What's the charge of a glass rod after rubbing it on silk? What's the charge of silk afterrubbing with a glass rod ? What's the charge of a rubberrod after rubbing it on fur or wool? What's the charge of fur or woolafter rubbing it with a glass rod?
Suppose you are selling apple cider for six dollars a gallon when the temperature is 3.6 °C. How much more money (in pennies) would you make per gallon by refilling the container
The Yaver-Bomber flies purely horizontally and constantly at 200 m/s relative to the ground. It does so an altitude of 1000 meters. How far away from the fig tree does the near the balloon land
How far must it now sail to reach its original destination. find the potential energy of the system.
Two equally charged spheres of mass 1.0 g are placed 2.0 cm apart. When released, they begin to accelerate at 655m/s^2. What is the magnitude of the charge on each sphere
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