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An elevator is moving downward when someone presses the emergency stop button. The elevator comes to rest a short time later. Give the signs for the velocity and the acceleration of the elevator after the button has been pressed but before the elevator has stopped.
an aluminum rod with a square cross section is l.3 m long and 5.2 mm on edge.a what is the resistance between its
Bob Richards is production manager of Zychol Chemicals, in Houston Texas, is making his quarterly report, which is to include a productivity examine for his section.
a particle with a mass of 3 mg and a charge of q is moving at a speed of 1300 ms along a horizontal path 14 cm below
A racetrack has the shape of an inverted cone. On this surface the cars race in circles that are parallel to the ground, at what value of the distance d should a driver locate his car
A 5.10 kg object on a horizontal frictionless surface is attatched to a spring with spring constant 880 N/m. The object is displaced from equilibrium 50.0 cm horizontally and given an initial velocity of 8.9 m/s back toward the equilibrium point.
Each of the current-carrying wires in the figure is long and straight, and carries the current either into or out of the page, as shown. What is the direction of the net magnetic field produced by these three wires at the center of the triangle?
An air-track glider attached to a spring oscillates between the 16.31 cm mark and the 51.41 cm mark on the track. What is the maximum speed of the glider
Assuming that the disks form a circular parallel plate capacitor and the electron are initially at rest when they pass through the first disk. A) determine the acceleration that the electrons undergo and B) the speed of the electrons as they pass ..
A solid spherical ball of mass 1.27 kg and radius 0.12 m rolls along a smooth, level surface with a speed of 2 m/s. How far up the plane does the ball go
A rope applies a horizontal force of 193 N to pull a crate a distance of 1.89 m across the floor. What is the work done by the frictional force
q1. what is the electric field strength at the point in space where a proton m1.67x10 -27 kg experiences an
the drawing shows an equilateral triangle each side of which has a length of 2.87 cm. point charges are fixed to each
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