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a person pulls a 10kg weight across a floor a distance x=2.0m by pulling on a rope with 50N directed 15 degrees above the horizontal. The coefficient of kinetic friction between the crate and the floor is uk=.20. Identify all the forces in the problem and compute the work done by each one.
An ideal gas at 11.7 °C and a pressure of 2.42 x 105 Pa occupies a volume of 3.84 m3. How many moles of gas are present
from the top of a 75m building, a 1.00 kg ball is thrown downwards with initial velocity of 8.00 m/s. what is the mechanical energy lost due to air resistance
q1. how many 104 w lightbulbs can you use in a 134 v circuit without tripping a 14 a circuit breaker? the bulbs are
A surface encloses the charges q1=3.4uC , q2=7.0uC, and q3=-3.8uC. Find the electric flux through this surface
A satellite with 2 rectangular solar cells wings with A=60m2, when the wings normally face the sun with an intensity I=1200 W/m2, how much force on the satellite due to the sunlight
Consider the (infinite) midplane between two charges of equal magnitudes and oppoisite signs. If the charges are + and - q, what is the electric flux through the midplane
Two objects moving toward each other collide and rebound. Determine the change in kinetic energy of the smaller object
A highly charged piece of metal (with uniform potential throughout) tends to spark at places where the radius of curvature is small, For that amount of charge, what is the potential of the sphere relative to infinity
compute the distance from the central maximum to the first bright region on either side of the central maximum.
a child tosses a stick into a stream. the stick moves downstream at a rate of 1.5 ms. how fast is the stick moving
A NASCAR racecar rounds one end of the Martinsville Speedway. This end of the track is a turn with radius approximately 57.0 m. What is the force responsible for the centripetal acceleration in this case
A horizontal laser beam of wavelength 632.8 nm has a circular cross section 2.00 mm in diameter. Find the required width of the aperture
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