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A 10-kg package is raised vertically from rest by an elevator at a constant acceleration of 2.5 m/s2.
A) Determine the kinetic energy of the package at 13 s after the elevator began raising the package.
B) Determine the change in the gravitational potential energy that the package undergoes in the 13 s.
C) Determine the amount of work that the gravitational force does on the package during the 13 s.
D) Determine the amount of work that the elevator does on the package during the 13 s.
A 20-kg child swings back and forth on a swing such that her height h in m from the ground as a function of x is described by: h(x) = 0.5 + 0.45x2 for -1.2 m ? x ? 1.2 m, What is the maximum potential energy of the child
Your professor enters the dogsled race during winter break. To getstarted, he pulls his sled, a mass 80 kg with a force of 180N at 20degrees to the horizontal. Find a) the work he does b) the finalspeed of the sled after it moves 30s.
A rifle is aimed horizontally at the center of a large target 250 meter away. Find the required angle of elevation above the line of sight
A 117Kg (including all the contents) rocket has an engine that produces a constant vertical force (the thrust) of 1820N. When it has reached an altitude of 120m how hard does the floor push on the power supply
A Ferris wheel has radius 5.0 m and makes one revolution in 8.0 seconds. A person weighing 670N is sitting on one of the benches attached at the rim of the wheel. What is the apparent weight (normal force exerted on her with the bench) of the person ..
A charge +q is located at the origin, while anidentical charge is located on the x axis at x =+0.690 m. What is the distance from the third charge to the origin
Aparticle with a mass of 7.50 10-20 kg is oscillating with simpleharmonic motion with a period of 4.5010-5 s and a maximum speed of 4.00 103 m/s. Calculate the angular frequency of the particle
a cameraman on a pickup truck is traveling westward at 20 kmh while he videotapes a cheetah that is moving westward 30
A capacitor consists of a set of two parallel plates of area A separated by a distance d. find the magnitude of the charge on the plates
two charges q1 and q2 have a total charge of 16 c. when they are separated by 1.5 m the force exerted by one charge on
In designing a transformer, an engineer knows she needs 240 V to come out of the secondary circuit. what is the ratio of primary voltage to primary turns
Consider the following vector fields: C=2x(x-direction), D=5x(y-direction), F=4s(phi-direction), G=3s(s-direction), For each field which could be magnetic, calculate the current density at the origin in two different ways
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