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A string is wound tightly around a fixed pulley whose radius is 5.0 cm. As the string is pulled the pulley rotates without slipping. What is the angular speed of the pulley when the string has a linear speed of 5.0 m/s? Please show work.
The engine weighs 4500 newtons and it is lifted 1.5 meters up by the block and tackle system. The mechanic must apply a force of 225 newtons while pulling a total of 37.5 meters of chain by the block and tackle pulley system. What is the work done..
A freshly prepared sample of a certain radioactive isotope has an activity of 11.2 mCi. After 4.40 h, its activity is 8.00 mCi. Find the decay constant
A heat pump (a heat engine run backwards) extracts energy from cold air outside (-5.00 degrees celsius), Determine the amount of heat added to the inside air per joule of work done by the motor
A laser beam is traveling through an unknown substance. When it encounters a boundary with air, the angle of reflection is 21.8°, What is the index of refraction of the substance
A 75kg hiker climbs to the top of a 4000m -high mountain. The climb is made in 5.0h starting at an elevation of 3000m. Calculate the average power output in horsepower
What must be the mass m2 of the hanging block if it is to descend 11.0m in the first 3.00s after the system is released from rest
In a diesel engine, the piston compresses air at 302 K to a volume that is 0.0612 of the original volume and the pressure that is 46 times the original pressure. What is the temperature of the air after the compression.
At a distance r away from a point charge q, the electric potential is V = 600 V and the magnitude of the electric field is E = 200 N/C
A ball rolls off a table and falls 0.70 m to the floor, landing with a speed of 4.3 m/s. What is the magnitude of the acceleration of the ball just before it strikes the ground
Illustrate what diameter has tip of the hour hand with 100 mil/hr tangential speed? If a 10 inch wide top is spinning at 300 RPM, what is the tangential speed at the widest part?
A particle of mass m moves in a force field whose potential in spherical coordinates is V = -(K cos?)/r2. Find the canonical equations of motion.
If a flea can jump straight up to a height of 22.0 , what is its initial speed as it leaves the ground, neglecting air resistance?
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