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A man pushing a crate of mass m = 92.0 kg at a speed of v = 0.870 m/s encounters a rough horizontal surface of length script l = 0.65 m as in the figure below. If the coefficient of kinetic friction between the crate and rough surface is 0.360 and he exerts a constant horizontal force of 290 N on the crate, find the following. (a) Find the magnitude and direction of the net force on the crate while it is on the rough surface. magnitude N direction (b) Find the net work done on the crate while it is on the rough surface. J (c) Find the speed of the crate when it reaches the end of the rough surface.
Calculate the gyrofrequency of an electron in Earth's magnetic field, having a value of ~ 35 A-m-1. Determine the electron density values required to produce a zero refractive index for the case of propagation parllel to Earth's magnetic field at a f..
A car of mass m is initially moving with a velocity v. Find the time that it takes for the car to come to rest
Shooter shoots a bullet horizontally and has muzzle velocity of 460m/s and goes 45.7m. How can you do this with the range equation
The highest rotary speed ever attained was 2010 m/s (4500 mph). The rotating rod was 15.2 cm (6 in.) long. What is the period of rotation of the rod
The hot-reservoir temperature of a Carnot engine with 26.0 % efficiency is 70.0 ?C higher than the cold-reservoir temperature. What is the cold reservoir temp
Two blocks m1 = 9.8 kg and m2 = 4.0 kg are connected by a homogeneous rope that has a mass of mr = 1.32 kg. What is the magnitude of the tension in the rope
The Beretta Model 92S (the standard-issue U.S. army pistol) has a barrel 127 long. What is the acceleration of the bullet while it is in the barrel
Suppose the highway is icy and the coefficient of friction between the tires and pavement is only one-third what you find in part (a). Illustrate what should be the maximum speed of the car so it can round the curve safely?
a bullet moving horizontally to the right (+x direction) with a speed of 500 m/s strikes a sandbagk, What is the average acceleration in m/s of the bullet
Estimate the heat flow when a double pane of glass is used with a 4.0 mm air gap between the panes? Each individual glass sheet is 4.0 mm thick
At very low termperatures the molar specific heat of many solids is approximately Csubv=AT^3..For alymninum, A=3,15 times 10^-5. how do we know that this is constant volume
A truck moving with a speed of 25.4 m/s strikes a parked car. During the collision the truck and car stick together and slide to a stop together. How far does the truck/car combination slide
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