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A factory worker moves a 28.0kg crate a distance of 4.80m along a level floor at constant velocity by pushing horizontally on it. The coefficient of kinetic friction between the crate and the floor is 0.300. A) What magnitude of force must the worker apply? B) How much work is done on the crate by the worker's push? C) How much work is done on the crate by friction? D) How much work is done by the normal force? E) How much work is done by gravity? F) What is the net work done on the crate?
Find the force on the electron in the hydrogen molecule ion for which the potential is represented by the follwoing. V= (-e^2/r1)+(-e^2/r2)
q1. a hollow aluminium cylinder is to be fitted over a steel piston. at 22degc the inside diameter of the cylinder is
A satellite has a mass of 6155 kg and is in a circular orbit 4.76 × 105 m above the surface of a planet. What would be the true weight of the satellite if it were at rest on the planet's surface
A laser beam is incident on two slits with a separation of 0.190 mm, and a screen is placed 5.30 m from the slits. what is the wavelength of the laser light
The radius of curvature of a loop-the-loop for a roller coaster is 11.8 m. Find the speed of the roller coaster at the top of the loop
Two conducting spheres are placed with their centers 0.325 m apart. One is given a charge of 11.0 nC and the other a charge of -18.0nC. compute the electric force exerted by one sphere on the other
An asteroid orbits the Sun at a constant distance of 3.540e+11 meters. The Sun's mass is 1.99×1030 kg. What is the orbital speed of the asteroid
If the dummy is thrown forward with force of 130.0 N while simultaneously being hit from the side with a force of 4500.0 N, illustrate what force will the sensor report?
A uniform 240 N ladder rests against a perfectly smooth wall, making a 40.0 angle with the wall. Find the normal forces that the wall on the ladder
water flows with soeed1 m/s from a small hole made at the bottom of a tank filled with water. find height of the tank
A light string is wrapped around a 0.20-kg hollow 0.080-m-radius hoop. What is the angular acceleration of the hoop
A vertical spring has one end attached to the ceiling and a 2.50-kg fish attached to the other one. find how fast the fish is moving after it drops 20.0 cm
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