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The answer to the following question is 16 N. That being F = v2/r. Why would I not also substitute mg into the equation (which would give me 11 N). Does this have to do with it being horizontal?
A 0.50-kg mass attached to the end of a string swings in a vertical circle (radius = 2.0 m). When the string is horizontal, the speed of the mass is 8.0 m/s. What is the magnitude of the force of the string on the mass at this position?
a cowboy fires a silver bullet of mass 5g with a muzzle speed of 257 ms into the pine wall of a saloon.what is the
He-Ne lasers are often used in physics demonstrations. They produce light of wavelength 633nm, What is the average energy density in the laser beam
A cube of ice is taken from the freezer at -8.4^circ C and positioned in a 114 g aluminium calorimeter filled with 322g of water at room temperature of 20.0 C. The final situation is observed to be all water at 15.0C.
A block of mass m = 3.07 kg is attached to a spring (k = 29.3 N/m) by a rope that hangs over a pulley of mass M = 6.14 kg and radius R = 8.81 cm. find the maximum extension of the spring
consider the reaction h2g co2g -gt h2og cog0.80 mole of h2nbspand 0.80 mole of co2nbspare placed in a 5dm3container
You find an unlabeled box of fine needles, and want to determine how thick they are. A standard ruler won't do the job, since all you can tell is that each needle is less than a millimeter thick.
A catcher stops a ball traveling at 28.0 m/s in a distance of 55.30 cm and feels a force of 313 N against his glove. What is the mass of the ball.
two upward forces are acting on a bolt. one force of 60.5 lb acts at an angle of 82.4 degrees above the horizontal and
What is the wavelength of the electromagnetic waves used for cell phone communications in the 900-MHz band?
A star radiates energy at the rate of 2.2 1026 W. Calculate the star's loss of rest mass per second
Running on a treadmill is slightly easier than running outside because there is no drag force to work against. Determine the drag force on the runner during the race
At this point you are getting very tired and would like to get back as quickly as possible, but all of the available trails seem to lead you deeper into the woods. You would like to take a shortcut directly through the woods (ignoring the trails)...
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