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An elevator has a mass of1170 kg and carries a maximum load of 786 kg. A constant frictionalforce of 4260 N retards its motion upward. Theacceleration of gravity is 9.8 m/s2 . What power must themotor deliver at a instantaneous speed of 3.36 m/s if the elevator is designedto provide an upward acceleration of 1.08 m/s2?
A radioactive atom is moving with respect to the laboratory (which is the Earth frame) at the speed of 0.8c in the +x direction. determine the velocity of the electron measured by a laboratory observer
Two rectangular pieces of plane glass are laid one upon the other on a table. A thin strip of paper is placed between them at one edge, Find the angle of the wedge
A uniform electric field exists in a region between two oppositely charged plates. An electron is released from rest at the surface of the negatively charged plate and strikes the surface of the opposite plate, 2.0 cm away, in a time 7.6 x 10-8 s. (a..
A typical jetliner lands at a speed of 148 mi/h and decelerates at the rate of (11.6 mi/h)/s. what is the total displacement of the jetliner
An electron has an initial velocity of 4.9 • 106 m/s in a uniform 1.9 • 105 N/C strength electric field. How far does the electron travel before coming into rest in m
A particular horizontal turntable can be modeled as a uniform disk with a mass of 230 g and a radius of 22.0 cm that rotates without friction about a vertical axis passing through its center
A 5 kg mass attached to a horizontal spring is pulled from its equilibrium position by 3 m and let go. what is the maximum velocity of the mass
You are pulling your younger sister along in a small wheeled cart. You weight 65.0 kg and the combined mass of your sister and the cart is 35.0 kg. What forces are applying to the ground in order to produce this acceleration
Recall from Section 14.3 that the average kinetic energy of an atom in a monatomic ideal gas is given by KE=(3/2)kT, Determine the de Broglie wavelength of a helium atom
If the floor at the base of a table is very hard, and a tennis ball dropped from the top of the table 1 meter high rebounds with 85% of its velocity
A garden hose of inner radius 0.8 cm carries water at 1.8 m/s. The nozzle at the end has radius 0.27 cm. How fast does the water move through the nozzle
A ball with a horizontal speed of 1.25 m/s rolls off a bench 1.00 m above the floor. How long will it take for the ball to hit thefloor?
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