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The shutter shown was formed by removing one quarter of a disk of 0.75-in. radius and is used to interrupt a beam of light emanating from a lens at C. Knowing that the shutter weighs 0.125 lb and rotates at the constant rate of 24 cycles per second, determine the magnitude of the force exerted by the shutter on the shaft at A.
A 2.9 MeV (kinetic energy) proton enters a 0.38 T field, in a plane perpendicular to the field. Evaluate what is the radius of its path
A top spins at 30 rev/s about an axis that makes an angle of 30 deg with the vertical. what is the precession rate
A student has 68 centimeter long arms. Find the minimum angular velocity for swinging a bucket of water in a vertical circle without spilling any
How long does it take an automobile traveling in the left lane of a highway at 60.0 km/h to overtake (become even with) another car that is traveling in the right lane at 20.0 km/h
two children are playing a game in which they try to hit a small box on the floor with a marble fired from a spring-loaded gun that is mounted on a table. How far should Rhoda compress the spring to score a direct hit
A laser is mounted on a table 1.10m above the ground, pointed at a vertical mirror a horizontal distance 3.60m away. At what height does the reflected beam strike the wall
A bowling ball of mass 1 kg hits a spring with velocity 1 m/s. The spring constant is also 1 (how convenient!). What is the maximum compression of the spring in centimeters
A baseball is thrown straight up. The drag force is proportional to.In terms of, what is the y-component of ball's acceleration when its speed is half its terminal speed and it is moving up.
Far in space, where gravity is negligible, a 485kg rocket traveling at 95.0m/s fires its engines. It shows the thrust force as a function of time. The mass lost by the rocket during these 30 s is negligible.
Two window washer works on a plank of mass 15 kg suspended by ropes that are tied to each end. The plank is a uniform piece of wood 4.0 meters wide. Person A has a mass of 75 kg and stands 0.5 m from the left side of the plank. Person B has a mass of..
A box stands against the wall of a cylinder that is rotating. The cylinder has a radius of 30cm. What is the minimum consant speed (magnitude of linear velocity) the box must move so it doesn't slip
A transformer is used to power a cell phone charging unit. If thetransformer has a primary/secondary turns ration of 40:1 and isconnected to a 120 V power source, what voltage is supplied to the charging unit?
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