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(A) 25 kg mass is lifted a vertical distance of 23 m in a time of 6 s. What average power was employed?
(B) 80 kW engine is used to lift a 1200 kg load. What is the average velocity of the lift?
(C) An 800 N student runs up a flight of stairs rising 8 m in 3 s. What is the average power expended?
Superman attempting to drink cold water through a straw of length L= 12m. the walls of the tubular straw are very strong and do not collapse. with his great strength, he achieves maximum possible suction and enjoys drinking the cold water.
On the Moon's surface, lunar astronauts placed a corner reflector, off which a laser beam is periodically reflected, What is the difference in travel time for light that travels only through space to the moon and back and light that travels through ..
A juggler performs in a room whose ceiling is 9 feet above the level of his hands he throws a ball vertically upward therefore that it just reaches the ceiling, Compute with what initial velocity does he throw the ball
A rock is thrown off a 120m cliff at a velocity of 2.9m/s[37 degrees above horizontal]. What is the final velocity of the rock as it hits the ground?
Sound with a frequency 650 HZ from a distant source passes through a doorway 1.10 m wide in a sound absorbing wall. Find the number and angular directions of the diffraction minima at listening positions along a line parallel to the wall.
A heavy box on a horizontal rough surface is pushed with a force of 12N. What is the magnitude of the frictional force
A vessel at rest at the origin of an xy coordinate system explodes into three pieces. Just after the explosion, one piece, of mass m, What is the direction of the third piece just after the explosion
A wave travels at 92 m/s and has a wavelength of 2.8 m. Calculate the wave frequency (in Hertz).
One car has twice the mass of a second car, but only half as much kinetic energy. When both cars increase their speed by 6.0m/s, What were the original speeds of the two cars
A sign (mass 1800kg ) hangs from the end of a vertical steel girder with a cross-sectional area of0.019m2 . Ignore the mass of the girder itself. What is the stress within the girder
what horizontal force is required to move the crate. If the coefficient of kinetic friction between a 33 kg crate and the floor is 0.26, what horizontal force is required to move the crate at a steady speed across the floor? Which is 84 I just help..
Your are driving along SW 8th Street (Tamiami Trail). It takes you 8.6 minutes from 107th Avenue to 87th Avenue. What was your average velocity
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