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A spring with k=130.0 N/m on surface is mounted to a vertical wall . A 5.00-kg box on the surface is placed in front of the spring. The coefficient of kinetic friction between the box and the surface is μk = 0.400. A constant force F→ is applied to the box. F→ has magnitude 82.0 N and is directed against the wall. The spring is compressed 80.0 cm.
a- Find the speed of the box?
b- Find the magnitude of the box's acceleration?
The distance to the nearest large spiral galaxy called Andromeda is 2.4 x 1022 m. How long does it take light to travel from us to Andromeda?
A 0.80 g cork ball with a charge of 1.50 µC is suspended vertically on a 0.300 m long light string in the presence of a uniform, downward-directed electric field of magnitude E = 1.00*105 N/C. If the ball is displaced slightly from the vertical, it o..
bob has just finished climbing a sheer cliff above a beach and wants to figure out how high he climbed. all he has to
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What is the magnitude of the acceleration of the girl?
A 72.0 kg base runner begins his slideinto second base when he is moving at a speed of 4 m/s. The coefficient of friction between hisclothes and Earth is 0.70. He slides so that his speed is zero justas he reaches the base.
A uniform heavy bar AB of length 2b rests against a smooth vertical wall at A and over a smooth fixed rod C, which is situated at a distance a from the wall. Take b>a. Decide an equilibrium value for theta.
A very long solenoid of circular cross section with radius R = 5.30 cm has n = 69.0 turns/cm. An electron is sitting just outside the solenoid, at a distance r = 5.80 cm from the solenoid axis. What is the magnitude of the force on the electron as..
A compound microscope has the objective and eyepiece mounted in a tube that is 18.0 cm long. The focal length of the eyepiece is 2.28 cm, what is the focal length of the objective
The escape velocity of a bullet from the surface of planet Y is 1727 m/s. Calculate the escape velocity from the surface of the planet X if the mass of planet X is 1.490 times that of Y, and its radius is 0.8790 times the radius of Y (in m/s).
What are the four lowest standing-wave frequencies for an organ pipe that is 4.44 m long and closed at one end? (Assume a temperature of 20° C.)
A pine cone falls from a tall tree. It takes 0.2 seconds to pass by a 2 meter tall window, i.e.the time between when it' s visible at the top of the window, How high above the window was it at its starting point
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