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Water stands at a depth D=35.0m behind the vertical upstream face of dam of width W=314m. Discover (a) the net horizontal force on the dam from the measure pressure of the water and (b) the net torque due to that force about a horizontal line during O parallel to the (long) width of the dam. This torque tends to rotate the dam around that line, which would cause the dam to fail. (c) discover the moment arm of the torque.
The suspension system of a 2400 kg automobile "sags" 11 cm when the chassis is placed on it. Also, the oscillation amplitude decreases with 48% each cycle. Estimate the values of (a) the spring constant k and (b) the damping constant b for the spring..
Three equal point charges, each with charge 1.35 mu C, are located at the vertices of an equilateral triangle whose sides are of length 0.60m. What is an electric potential energy U of the system? (Take as zero the potential energy of the three ch..
A block of ice of mass 3.50 is placed against a horizontal spring that has force constant = 210 and is compressed a distance 2.90×10?2. Calculate the work done on the block by the spring
In an amusement park "Rocket" ride, cars are suspended from 4.25 m long cables attached to rotating arms at a distance of 6.00 m from the axis of rotation. What would the angular speed be if the angle of the "Rocket" cars were changed to 60o from v..
What is the number of turns on the coil and what is the magnetic field at the mean radius?
A 2000kg car accelerates from 20 to 60km/h on an uphill road. Determine the work done by the engine
An antique bicycle wheel has a diameter of 63 cm and a mass of 1.8kg. Suppose that the wheel is a hoop with all the mass concentrated on the outside radius. The bicycle is placed on a stationary stand therefore that one can easily spin the wheel. Wha..
A batter strikes a baseball moving horizontally towards him at 15 m/s. the ball leaves the bat horizontally at 24 m/s, determine the change in velocity of the ball
Objects A and B are on a horizontal surface. Object A exerts a force on object B, and, in accordance with the laws of motion, generates a reaction force.
an empty parallel plate capacitor is connected between the terminals of a 8.92-v battery and charges up. the capacitor
Suppose that a parallel-plate capacitor has circular plates with radius R = 40.0 mm and a plate separation of 4.0 mm. Suppose also that a sinusoidal potential difference with a maximum value of 340 V and a frequency of 120 Hz is applied across the pl..
Larry is standing at the edge of a vertical cliff 210m about the sea. how far has the rock traveled horizontally when it hits the water
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