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A student standing on a stationary skateboard tosses a textbook with a mass of mb = 1.25 kg to a friend standing in front of him. The student and the skateboard have a combined mass of mc = 82 kg and the book leaves his hand at a velocity of 2.8 m/s at an angle of 43° with respect to the horizontal.
Write an expression for the magnitude of the velocity of the student, vs, after throwing the book.
Calculate for the magnitude of the velocity of the student, vs in m/s?
What is the magnitude of the momentum, Pe, which was transferred from the skateboard to the the Earth during the time the book is being thrown (in kg-m/s)?
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A sample of an unknown material weighs 300 N in air and 200 N when immersed in alcohol. The density of the alcohol is 70% the density of water. determine the volume of the unknown material
What phase difference between two otherwise identical harmonic waves, moving in the same direction along a stretched string, will result in the combined wave having an amplitude 1.4 times that of the amplitude of either of the combining waves? Exp..
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After a plant or animal dies, its 14C content decreases with a half-life of 5730 years. what is the age of the ancient site
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Find the equation for the acceleration of the moving body at any time.
A 75 kg ladder that is 3.0 m in length is placed against a wall at an angle theta. The center of gravity of the ladder is at a point 1.2 m from the base of the ladder. find the static frictional force between the floor and the ladder
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