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You find that it takes a horizontal force of 171 {rm N} to slide a box along the surface of a level floor at constant speed. The coefficient of static friction is 0.76, and the coefficient of kinetic friction is 0.37
If you place the box on a dolly of mass 5.3 {rm kg} and with coefficient of rolling friction 1.3×10−2, what horizontal acceleration would that 171 {rm N} force provide?
Find out the normal force exerted on the crate by the elevator.
A 145 g wire is held under a tension of 258 N with one end at x = 0 and the other at x = 13.0 m. At time t = 0, pulse 1 is sent along the wire from the end at x = 13.0 m. At time t = 30.9 ms, pulse 2 is sent along the wire from the end at x = 0. A..
Suppose you wish to fabricate a uniform wire out of 2.6 g of copper. If the wire is to have a resistance of R = 0.25 and if all of the copper is to be used, what must be the length of the wire in m and the diameter of the wire in mm.
A box is hanging from a chain having a mass of 60 kg. The box has a mass of 78 kg. Find the tension in the top of chain and the bottom of the chain.
Two test charges are located in the x-y plane. If q1 = -3.20 nC and is located at x = 0.00 m, y = 1.160 m and the second test charge has magnitude of q2 = 5.00 nC and is located at x = 1.00 m, y = 0.500 m, calculate the x and y components, Ex and ..
A 23 kg body is moving in the direction of the positive x axis with a speed of 292 m/s when, owing to an internal explosion, it breaks into three pieces.
What is the highest value of the magnetic force.
Estimate the ball's rise in temperature.
On a workday the average decibel level of a busy street is 69 dB, with 102 cars passing a given point every minute. If the number of cars is condensed to 39 cars every minute on a weekend, what is the decibel level of street.
A rabbit runs in a straight line with a velocity of +1.6 m/s for a period of time, rests for 9 s, and then runs again along the same line at +0.55m/s for an unknown amount of time. The rabbit travels a total distance of 1116m, and its average spee..
A man strides across a bed of embers. Assume the glowing charcoal is covered with a thin layer of ash 0.50 mm thick and is at a temperature of 650C. The thermal conductiviity of ash and charcoal is 1.5 W/ (mxK). (a) Estimate the heat transferred t..
What is the force on the 1 nC charge at the bottom. how far will it skid if it is traveling at 120 km/h when its brakes lock.
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