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A uniform rod of mass 2.65×10?2kg and length 0.450m rotates in a horizontal plane about a fixed axis through its center and perpendicular to the rod. Two small rings, each with mass 0.220kg , are mounted so that they can slide along the rod. They are initially held by catches at positions a distance 4.70×10?2m on each side from the center of the rod, and the system is rotating at an angular velocity 26.0rev/min . Without otherwise changing the system, the catches are released, and the rings slide outward along the rod and fly off at the ends.
a. What is the angular speed of the system at the instant when the rings reach the ends of the rod?
b. What is the angular speed of the rod after the rings leave it?
A car travels at a constant speed around a circular track whose radius is 2.51 km. What is the magnitude of the centripetal acceleration of the car
The ratio of the number of turns in the primary to the number of turns in the secondary of a step-down transformer is 25:1. how much power is delivered to the secondary
A 10.0g plastic ball is dropped from a height of 3.30m and is moving at 3.00m/s, How much mechanical energy was lost during the balls fall
A gun shoots bullets that leave the muzzle with a speed of 205m/s. If a bullet is to hit a target 151m away at the level of the muzzle, the gun must be aimed at a point above target.
The radius of our galaxy is 3 *10^20m, How much time would elapse on earth during the traversal
At an outdoor market a bunch of bananas is set to oscillatory motion with amplitude of 20.0 cm on a spring with a force constant of 16 N/m.
An intergalactic rock star bangs his drum every 1.52 s. A person on earth measures that time between beats is 2.10 s. How fast is the rock star moving relative to the earth.
Two metal spheres, each weighing 24-kg are placed 0.05 m apart. Compute the magnitude of the gravitational force the two spheres exert on each other.
A guitar string is 90.0 cm long and has a mass of 3.27g . From the bridge to the support post (=?) is 60.0 cm and the string is under a tension of 514 N
For this experiment you will require a stand, string, a paper or plastic cup, a nail, a roll of paper towels or similar sized paper, coloured sand, or some other dry powdery product, and a ruler or measuring tape.
The Earth is constantly being bombarded by cosmic rays, which consist mostly of protons. Assume that these protons are incident on the Earth's atmosphere from all directions at a rate of 1090. protons per square meter per second.
A 1040 kg car carrying four 80 kg people travels over a rough "washboard" dirt road with corrugations 2.0 m apart that causes the car to bounce on its spring suspension. The car bounces with maximum amplitude as its speed is 21 km/h. The car now stop..
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