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In a game of pool, ball A is moving with a velocity v0 of magnitude v0 = 15 ft/s when it strikes balls B and C, which are at rest and aligned as shown. Knowing that after the collision the three balls move in the directions indicated and assuming frictionless surfaces and perfectly elastic impact (that is, conservation of energy), determine the magnitudes of the velocities vA, vB, andvC.
the earths magnetic field can affect the electron beam in an oscilloscope or a television tube. an electron that has
A 9.4-kg watermelon (30 degrees)and a 7.8-kg pumpkin (53 degrees) attached to each other via a cord that wraps over a pulley, Find the accelerations of the pumpkin and the watermelon
A 14.2-g piece of Styrofoam carries a net charge of -0.69 µC and is suspended in equilibrium above the center of a large, find the charge per unit area on the plastic sheet
A 868 kg automobile is sliding on an icy street. It collides with a parked car which has a mass of 663 kg. The two cars lock up and slide together with a speed of 22.9 km/h. What was the speed of the first car just before the collision?
What are the period and speed of a person on a carousel if the person has an acceleration with a magnitude of 0.69 m/s2 when she is standing 4.2 m from the axis
On an old-fashioned rotating piano stool, a woman sits holding a pair of dumbbells at a distance of 0.590 from the axis of rotation of the stool. What is the initial angular momentum of the system
Dan hits a hockey puck, giving it an initial velocity of 3.0m/s. If the coefficient of kinetic friction between ice and puck is0.020, How far will the puck slide before stopping
A person stands on a scale in an elevator. As the elevator starts, the scale has a constant reading of 588 N. Determine the weight of the person
A person ofmass 75 kg stands at the center of a rotating merry-go-roundplatform of radius 2.8 m and moment of inertia 1300 kgm2. Calculate the rotational kinetic energy of the system
Suppose that 7.00g of a nuclide of mass number 105 decays at a rate of 6.14 x 1011 Bq. What is its half-life
The cord is after that pulled from below, shortening the radius of the circle in which block revolves to 0.15. Model the block as a particle.
A football is kicked from ground level and lands 57.0 m downfield. What max heigh above the ground does the ball reach
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