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How much work is done by a 86.5 kg man running up a flight of stairs 20.0m long in 4.25 seconds if the stairs make an angle of 55* with the vertical wall to which the stairs are fastened?
how much power does the man exert while running?
The loaded cab of an elevator has a mass of 3.0 x10^3 kg and moves 157m up the shaft in 23s at constant speed. At what average rate does force from the cable do work on the cab.
A 6.0 V battery is connected to a wire made of three segments of different metals connected one after another, Find the potential difference across tungsten wire
One day, after pulling down your window shade, you notice that sunlight is passing through a pinhole in the shade and making a small patch of light on the far wall. estimate the diameter of the pinhole
q1. how much would an 80.0 kg person weight a on mars where an acceleration of gravity is 3.93 ms2 and b on earths moon
suppose the driver in this example now slams on the brakes, stopping the car in 4.00s. find the acceleration and the distance the car traveled while braking
A tuning fork of unknown frequency makes three beats per second with a fork of frequency 373 Hz, What is the frequency of this fork
A solid disk of radius R and mass 2.66 kg is spinning at angular velocity 66.2 rpm about a vertical axis. What is the mass of the second disk
A generator has a square coil consisting of 500 turns. The coil rotates at 82 rad/s in a 0.49 T magnetic field. What is the length of one side of the coil
Three resistors having resistances of 1.50{\rm \Omega} , 2.30{\rm \Omega}, and 4.70{\rm \Omega} are connected in parallel to a 29.0{\rm V}battery that has negligible internal resistance
What is the resultant displacement when a dog runs 36 m North, and then changes direction to run 13.6 m West? answer sketching diagram and showing all calculation.
A stretched cord has a fundamental frequency of 144 Hz, a length of .9 m, and a mass of 2 g. What is the tension on the cord
A block starts with a certain speed at the top of a frictionless inclined plane with an unknown angle to the horizontal. To calculate the time required for the block to reach the bottom of the plane.
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