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A swift blow with the hand can break a pine board. As the hand hits the board, the kinetic energy of the hand is transformed into elastic potential energy of the bending board; if the board bends far enough, it breaks. Applying a force to the center of a particular pine board deflects the center of the board by a distance that increases in proportion to the force. Ultimately the board breaks at an applied force of 860N and a deflection of 1.6cm .
To break the board with a blow from the hand, how fast must the hand be moving? Use 0.50kg for the mass of the hand.
An inductor (L=500 mH), a capacitor (C=4.00 uF), and a resistor (R=600 O) are connected in series. Calculate the required maximum voltage
You are working out on a rowing machine. Each time you pull the rowing bar (which simulates the oars) toward you, find the magnitude of the force that you exert on the handle
Two thin lenses with a focal length of magnitude 7.50 cm , the first diverging and the second converging, are located 5.63 cm apart. How far from this first lens is the final image formed
A bowling ball encounters a 0.760-m vertical rise on the way back to the ball rack, as the drawing illustrates. Find the translational speed at the top
how fast was the car going on the table. find the vertical and horizontal components of the pendulum's displacement.
Abolt comes loose from underneath an elevator that is moving upward at a speed of 6.1 m/s. what is the speed of the bolt when it hits the bottom of the shaft
A gas at a temperature of 382 K, a pressure of 197 kPa and occupying a fixed volume of 0.38 m3, is heated so that the temperature of the gas rises by 34 K. What is the pressure of the heated gas? Give your answer in pascals.
A rod 50 cm long and 1.0 cm in radius carries a 2.0 microC charge distributed uniformly over its length. Find the approximate magnitude of the electric field
A 10000 N car comes to a bridge during a storm and finds the bridge washed out. How fast should the car be traveling just as it leaves the cliff in order to clear the river and land safely on the opposite side
What is the magnetic field amplitude of an electromagnetic wave whose electric field amplitude is 15V/m
You are driving just behind a second car and both of you are moving at a speed 58mi/h. What is the minimum safe distance
The objective lens of the refracting telescope at the Lick Observatory in California has a focal length of 57 ft. What is the refractive power of this lens
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