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A 0.5 kg dart is fired vertically from a spring gun that has spring constant of 4000 N/m. Prior to release the spring was compressed by 10.7 cm. When dart is 6.8m above the gun its upward speed is 28m/s. Determine maximum height reached by dart.
A 720-kg race car can drive around an unbanked turn at a maximum speed of 43 m/s without slipping. The turn has a radius of 160 m, What is the coefficient of static friction between the track and the car's tires
Two new particles, which have identical positive charge q3, are placed the same 0.0434 meters apart, and the force between them is measured to be the same as that between the original particles, What is q3
Suppose you hear a clap of thunder 15.80 s after seeing the associated lightning stroke. The speed of sound waves in air is 343-m/s, and the speed of light in air is 3.00x 10^8 m/s.
A rocket with mass 1000kg accelerates upwards at a rate of 20m/s (a) How long does it take before it is going at the speed of sound (334 m/s)? (b) How long does it take before the rocket is at a height of 100km?
A flat sheet of ice (n = 1.309) has a thickness of 1.6cm. It is on top of a flat sheet of crystalline quartz (n = 1.544) that has a thickness of 0.86cm. Light strikes the ice perpendicularly and travels through it and then through the quartz. In t..
At one instant a bicyclist is 50 m due east of a park's flagpole, going due south with a speed of 9 m/s. Then, 24 s later, the cyclist is 45 m due north of the flagpole, going due east with a speed of 20 m/s. For the cyclist in this 24 s interval,..
After impact, the block slides 7.5 m before coming to rest. If the coefficient of kinetic friction between block and surface is 0.650, illustrate what was the speed of the bullet immediately before impact?
A 1.0mm -diameter, 40cm -long copper wire carries a 3.5A current, What is the potential difference between the ends of the wire
A man exerts a 328 N force to move a box across a 3.55-m patch of ice. How much work does he do on the box.
Two small spheres, each with mass m = 3.1 g and charge q, are suspended from a point by threads of length L = 0.23 m
A cement block accidentally falls from rest from the ledge of a 74.8-m-high building. When the block is 18.4 m above the ground, a man, 2.10 m tall, looks up and notices that the block is directly above him. How much time, at most, does the man have ..
Space invaders land on earth. On the invaders' temperature scale, the ice point is at 25°I (I = invader), and the steam point is at 153°I.
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