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A uniform rigid thin board that is 2.4 m long and weighs 200N is attached to a post by a pivot at point P and hangs over the edge of a building, as shown above. A crate weighing 400N is attached to the right end of the board. The left end of the board, 0.8m from the pivot, is attached to a light vertical wire anchored at the other end to keep the board from rotating. What is the magnitudes of the forces exerted by the string and the pivot on the board?
What is his efficiency for the12.0 h climb?
A projectile is fired straight upward at 141 m/a. how fast is it moving at the instant it reaches the top of its trajectory? Assume in its place that it was fired upward at 45. What would be its speed at the top of its trajectory.
Suppose that the brakes in your vehicle create a constant deceleration of 2.9 m/s2 regardless of determine how fast you are driving. Assume you double your driving speed from 15 m/s to 30 m/s
what is the depth d. what is the angle of refraction.
If the free end of the string is held in place and the hoop is released from rest , calculate the angular speed of the rotating hoop after it has descended 0.750m
A 12.0 V dc battery having no appreciable internal resistance, a 150.5 ohm resistor, an 11.2 mH inductor, and an open switch are all connected in series. what is the maximum energy stored in the inductor
include a free body diagram. Be sure to label all forces with their agents and size. 1. A 5.0kg cat running along suddenly braces his furry feet on the slippery floot in order to stop.
Do you think the Dow Chemical corporate image campaign described in this chapter will be successful? Why or why not? What do you see as key success factors for a corporate image campaign?
A baseball coach shouts loudly at an umpire standing 3.8 meters away. If the sound power produced by the coach is 2.2 × 10?3 W, what is the intensity of the sound when it reaches the umpire? Answer in units of W/m2.
A defibrillator is used during a heart attack to restore the heart to its normal beating pattern. How much charge moves during this time
An automobile has 53% of its weight on the front wheel. The front and back wheels are separated by 3 meter. Determine where is the center of gravity located with respect to the front wheels
A 3.90-kg object is attached to a spring and placed on frictionless, horizontal surface. Find the total energy of the oscillating system
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