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An 80.0-kg man jumps from a height of 2.50 m onto a platform mounted on springs. As the springs compress, he pushes the platform down a maximum distance of 0.240 m below its initial position, and then it rebounds. The platform and springs have negligible mass.
What is the man's speed at the instant he depresses the platform 0.120 m?
If the man just steps gently onto the platform, what maximum distance would he push it down?
Calculate the potential energy stored in the bow, if the arrow of mass 5.50 10-2 kg leaves the bow with a speed of 45.0 m/s. Assume that mechanical energy is conserved.
How much work does the string do on the boy if the boy walks a horizontal distance of 11m away from the kite? How much work does the string do on the boy if the boy walks a horizontal distance of 11m toward the kite.
The third floor of a house is 6.00 m above street level. How much work is essential to move a 159 kg refrigerator to the third floor.
What are the max and min values of the instantaneous power?
what most height above the ground will the rocket achieve.
Three charges are on the y-axis. Two of the charges, each ?2q, are locatedy=±d, and the third charge, +4q, Derive an expression for the electric field at a point P on the x-axis
A long, straight wire runs along the axis of the solenoid, carrying a current of 15. Find out the magnitude of the net magnetic field a radial distance of 0.80 from the straight wire.
Boat A negotiates a curve whose radius is 370 m. Boat B negotiates a curve whose radius is 120 m. Each boat experiences the similar centripetal acceleration. What is the ratio of speed of boat A to that of boat B.
A water molecule, which is electrically neutral but has a dipole moment of magnitude p = 6.20·10-30 C m, is 3.20 cm away from a point charge q = +6.90 ?C, Calculate the magnitude of the net force
A girl delivering newspapers covers her route by traveling 9.00 blocks west, 4.00 blocks north, and then 2.00 blocks east, What is the total distance she travels
An empty capacitor is capable of storing 1.0 × 10-4 J of energy when connected to a certain battery. If the distance between the plates is halved and then filled with a dielectric, how much energy could this modified capacitor store when connected..
what is the magnitude of the net force acting on ball.
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