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A spring has a force constant of 100 N/m and an unstretched length of .07 m. One end is attached to a post that is free to rotate in the center of a smooth table. The other end is attached to a 1 kg disc moving in uniform circular motion on the table, which stretches the spring by .03 m. Friction is negligible. What is the centripetal force on the disc? A. .3 N B. 3N C. 10 N D. 300 N E. 1,000 N
A loudspeaker of mass 21.0 {rm kg} is suspended a distance of h = 2.40 {rm m} below the ceiling by two cables that make equal angles with the ceiling. Each cable has the length of l = 3.90 {rm m}.
A 240g block on a 60cm-long string swings in a circle on a horizontal, frictionless table at 70rpm.
A barefoot field-goal kicker imparts a speed of 26 m/s to a football at first at rest. If the football has a mass of 0.24 kg and the If the football has the mass of 0.24 kg and the time of contact with the ball is 0.037 s, what is the force exerte..
A dentist uses a small mirror of radius 44mm to locate a cavity in a patient's tooth. If the mirror is concave and is held 13 mm from the tooth, what is magnification of the image.
A car traveling at 24.0 {rm m/s} runs out of gas while traveling up a 25.0^circ slope. How far would the car go up the hill before it runs out of gas.
What is horizontal distance from press box to second base
The George Washington bridge, that spans the Hudson River between New York and Jersey, is 4670 feet long and is made out of steel, How much does it expand in length between winter and summer.
What is the speed of each ball as it strikes the ground? How far apart are the balls 0.700 s after they are thrown.
An elevator accelerates upward at 1 m/s2. When the elevator is moving upward at 2 m/s, a bolt drops from the ceiling which is 2.5 m above the?
A playground merry-go-round has radius 3-{rm m} and moment of inertia 3000-{rm{ kg}} cdot {rm{m}}^2 about a vertical axle through its center, and it turns with negligible friction.
What hormones are hypersecreted causing hyperglycemia and hypertension? What is the cause and what physical factor allow to rule out thyroid problem.
The magnitude of q is chosen to make the potential difference between spheres 430 V, with the inner sphere at higher potential. Compute q.
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