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A horizontal force of 150 Newton is used to push a 35.5 kilogram packing crate a distance of 5.70 meter on a rough horizontal surface. If the crate moves at a constant speed, determine the work done by the 150 Newton force and the coefficient of kinetic friction between crate and surface?
earth's radius is 6.38x10^6 m, and it completes one revolution every day. What is the tangential speed of a person standing on the on the equator
A cart of mass 360 g is placed on a frictionless horizontal air track. A spring having a spring constant of 9.0 N/m is attached between the cart and the left end of the track.
A 3.30-g copper coin at 21.0°C drops 45.0 m to the ground. (Assume the specific heat of copper is 387 J/kg · °C.) determine the coin's final temperature
A small ball with mass m is attached to a string, which goes over a pulley and makes a small angle swing. Derive the period of this simple pendulum
2000 kg elevator is accelerated uniformly from rest to 4 m/s in a time of 90s. find the change in mechanical energy of the elevator
A body is displaced (1.5i - 2.0j) m while being acted on by the force (2.0i - 3.0j) N. How much work is done on the body by the force
At a carnival, you can try to ring a bell by striking a target with a 7.99-kg hammer. How fast must the hammer be moving when it strikes the target so that the bell just barely rings
Three 18-cm-long rods form an equilateral triangle. find the electric field strength at the center of the triangle
The Specific heat capacity at constant pressure of a gas varies with the temperature according to the expression: C_p = ( a + bT - c/T^(2) )
A spring with spring constant k=400 N/m and damping constant b=0.5kg/s has a mass of m=0.01 kilogram hanging from it. If the amplitude of the oscillation is measured with a ruler, find what is the result
A mass of 145 g of hot coffee at 90.0 oC is poured into an insulated cup containing 240 g of ice initially at 0.0 oC. How many grams of liquid will there be then
A line in the x-ray spectrum of gold has a wavelength of 18.5 pm (=18.5 x 10^-7 m), What is the energy of the lower stationary state
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