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A boy pulls a 5.0 Kg sled 10.0 m along a horizontal surface at a constant speed. The coefficient of kinetic friction is 0.20 and his pull is 37 degrees above the horizontal.
A.) what work does he do pulling the sled? (that is, what is the work done on the sled by the boy?)
B.) would the boy do more, less, or the same amount of work if he pulled horizontally on the sled?
An experimental bicycle wheel is placed on a test stand so that it is free to turn on its axle. If a constant net torque of 5.00 N · m is applied to the tire for 3.00 s, Compute the friction torque
On planet Zog, Mr. Spock measures that it takes 1.38 s for a mass of 0.30 kg to hit the ground when released from rest from a height of 2.85 m
You are setting up two standing string waves. You have a length of uniform piano wire that is 6.0m long and has a mass of 0.150kg . You cut this into two lengths, one of 2.6m and the other of 3.4m , and place each length under tension. What should..
A fireman 44 m away from a burning building directs a stream of water from a ground-level fire hose at an angle of 22° above the horizontal. If the speed of stream as it leaves the hose is 40m/s, at what height will stream of water strike the buil..
An airtight box has a removable lid of area 2.46 × 10-2 m2 and negligible weight. find the magnitude of the force required to pull the lid off the box
Two hockey players strike a puck of mass 0.169 kg with their sticks simultaneously, exerting forces of 1.17 103 N, compute the instantaneous acceleration of the puck
A double slit with d= 0.02 mm is illuminated by a blue laser at 450 nm and a red laser at 650 nm, what is the distance separating the blue and red fringe
Light of wavelength 589 nm is incident on a single slit that is 0.720mm wide, and the resulting diffraction pattern is observed on a screen 2.00m away. What is the distance between the two dark fringes on either side of the central bright fringe
A current of 2.0 A is flowing along the z-axis in the positive z direction from the origin to z=-2 m. Find the magnetic field, Which field is the strongest and Why
An electron and a proton are accelerated starting from rest through a potential difference of 10 million volts. Find the momentum (in MeV/c) and the kinetic energy (in MeV) of each
The sunlight reaching the earth has a maximum electric field 810 V/m. compute the maximum magnetic field associated with it.
The center fielder for the school's baseball team throws a 0.150-kg baseball towards home plate at a speed of 26.0 m/s, What is the kinetic energy of the baseball
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