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Two tiny masses are stuck to a disk originally rotating counter-clockwise at 33 rad/s about its center. Mass 1 is located a distance of 0.39 meters from the center and mass 2 is located at 0.73 meters from the center. A constant angular acceleration is applied to the disk and after a time of 1.8 seconds mass 1's tangential velocity is 6 m/s in the +x direction when it is below the disk's center (as in the example in class). What is the magnitude of the tangential velocity of mass 2, in m/s, after 2.5 seconds?
A 75kg man standing on a scale in an elevator notices that as the elevator rises, the scale reads 825N. What is the acceleration of the elevator
A hydraulic jack utilized to lift cars is called a three-ton jack. The large piston is 22 mm in diameter, the small one 6.3 mm. Suppose that a force of 3 tons is 3.0 x 104 N.
A rubber ball of mass 39.0 g is dropped from a height of 1.80 m onto a floor. The velocity of the ball is reversed by the collision with the floor, What impulse was applied to the ball during the collision
A car is designed to get its energy from a rotating flywheel (solid disk) with a radius of 1.00 m and a mass of 400 kg. Find the kinetic energy stored in the flywheel
Calculate the kinetic energy of alpha particles that bend with a radius of R = 0.63m in a magnetic field of B = 0.5T.
Six artificial satellites complete one circular orbit around a space station in the same amount of time. Each satellite has mass and radius of orbit. The satellites fire rockets that provide force needed to keep a circular orbit around the space stat..
q1. a steel paper clip is bent by a force of 10.2 n exerted on it through a distance of 4.85 cm. by how much does
Air is flowing steadily through a cooling section where it is cooled from 30 °C to 15 °C at a rate of 0.25 kg/s. If the average COP of the air-conditioner is 2.8 and the unit cost of electricity is 7 cents per kWh. Determine the cost of electricity c..
In shot putting, several athletes elect to launch the shot at an angle that is smaller than the theoretical one (about 42 degree) at which the distance of a projected ball at the same speed and height is greatest, Find by what percent is the launch..
An initially neutral conductor contains a hollow cavity in which there is a -100 nC point charge. what is the charge on the inner wall of the cavity wall
A "door closer" is attached to the door and the top of the door frame.When the door is open and at rest, the door closer exerts a torque of 4.8 {rm N} cdot {rm m}. What is the least force that you need to apply to the door to hold it open.
You have to do 2.2 kJ of work to push a 78-kg trunk 3.1 m along a slope inclined upward at 22 degrees , What is the coefficient of friction between trunk and slope
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