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A motorcyclist heads due north at 20.0 m/s. At a fork in the road, she veers right, ending up with speed 16.0 m/s directed 30° east of north.
(a) Draw the initial and final velocity vectors for the motorcyclist; then draw the change-in-velocity vector.
(b) Find the change-in-velocity vector in component form.
(c) Find the magnitude and direction of the change-in-velocity vector.
An energy storage system based on a flywheel (a rotating disk) can store a maximum of 3.0 MJ, What is the moment of inertia of the flywheel
A pair of eyeglass frames are made of an epoxy plastic (coefficient of linear expansion = 1.30 10-4°C-1). To what temperature must the frames be heated
In the Compton Effect, momentum conservation applies so total momentum of the photon and the electron is the same before and after the scattering occurs.
An object with a mass of 1.60kg is at rest on a horizontal, frictionless surface of a rink. What are the positions and speed of the object st the end of that time
Write an expression for a harmonic wave that has an amplitude of 18cm, a wavelength of 2.0m, and propagates to the left at 15 m/s
q1. a solid rock is suspended in air by a spring scale. the rock has a mass of 2.50 kg. when the rock is dunked in
A jogger takes 49 minutes to run 22 times around a track that measures 0.25 mile. What is her average velocity in mph and m/s
Two metal spheres, each of mass 20 g and initially at rest, are dropped from a height of 10 m in an evacuated chamber. Find the difference in final speeds of the two spheres
A hot-air balloon is rising straight up with a speed of 3 m/s. How much time elapses before the ballast bag hits the ground
An automobile initially moving 72. km/hr jams the brakes and skids to a stop in a distance of 24. What is the coefficient of friction for dry weather
A girl rides an escalator that moves her upward at a constant speed. As the girl rises, how do her gravitational energy and kinetic energy change.
A scaffold of mass 60 kg and length 5.5 m is supported in a horizontal position by a vertical cable at each end. find the tension in the cable closer to the painter
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