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A box weighing 1000N is pulled at constant velocity along a rough horizontal floor by a 300N force directed at 20 degrees above the horizontal. What is the coefficient of kinetic friction between the box and the floor?
A research submarine has a 40.0cm -diameter window 8.30cm thick. The manufacturer says the window can withstand forces up to 1.10×106N
A 195g oscillator has a speed of 91.50cm/s when its displacement is 3.90cm and 73.0cm/s when its displacement is 6.20 cm
A baseball outfielder throws a 0.150 kilogram baseball at a speed of 38.0 m/s and an initial angle of 27.0 degree. Find the kinetic energy of the baseball at the highest point of its trajectory
A satellite is originally in an orbit of radius r, but eventually, because of friction descends to the Earth, hitting the ground with some relatively.
A spring is oscillating with a frequency of 1.7Hz. 3.9 seconds after the spring is released it is -20cm from equilibrium. Find the amplitude of the spring
A small spherical cavity of radius r is made in a large electrics (a dielectric material) of constant polarization P. Neglecting the effects of outer boundaries of the electrets find the electric field at the center of the cavity.
Suppose that an investor is considering decisions that lead to the following possible payoffs: $1,500, $4,300, $22,000, $31,000, and $56,000 (the investments have different levels of risk). We now try to assess the investor's utility function.
A 50 ice skater spins about a vertical axis through her body with her arms horizontally outstretched, making 2.50 turns each second. The distance from one hand to the other is 1.5 . Biometric measurements indicate that each hand typically creates ..
Consider a 648 N weight held by two cables. The left-hand cable had tension T2 and makes an angle of 53 degree with the ceiling. What is the tension in the cable labeled T1 slanted at an angle of 40 degree
Two points are given in polar coordinates by (r,?) = (3.0 m , 40.0°) and (r,?) = (5.0 m, -40.0°), respectively. What is the distance between them
Using Rayleigh's method, estimate the fundamental frequency of the lumped-mass system shown in Figure.
Coil springs are widely used in industry. Those used in scientific instruments must be manufactured to exhibit consistent performance. Calculate the force constant k
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