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You and a friend are bicycling from Sprindale to Bentonville. You maintain a constant speed for the entire distance trip. Your friend, however, goes 1mph faster than you for the first half of the distance to Bentoville and 1mph slower than your for the seond half of the distance. Who gets to Bentonville first? Explain your reasoning.
A few days later your friend challenges yout to a 100m dash. You gladly accept because you know that you can easily outrun your friend. In the middle of the dash, however, something gets stuck to your shoe and you must briefly stop to get it off. The graph below shows the velocity-time curves for you and your friend; both of you continue to run beyond the finish to cool off. Who wins? Expalin your reasoning.
A 1.20 brick is sliding next to on a rough horizontal surface at 15.0 .If the brick stops in 4.30, how much mechanical energy is lost?
A damped mass-spring system oscillates at 275-Hz. The time constant of the system is 2.0 s. At t = 0, the amplitude of oscillation is 3.20cm and the energy of the oscillating system is then 32 J.
Three point charges are arranged at the corners of a square, with charge -Q on both the particle at the upper left corner and the particle at the lower right corner and with charge +2Q on the particle at the lower left corner.
calculate the fraction of which is submerged when the cylinder floats in alcohol. Fraction of Vwood submerged.
The loaded cab of an elevator has a mass of 3.0 x10^3 kg and moves 236 m up the shaft in 23s at constant speed. At what average speed does the force from the cable do work on the cab?
on turning a corner ,a motorist rushing at 44m/s find a child on road 100m away. he applies the brakes so as to stop the motorcar within 1m of child. calculate the time required to stop.
Two horizontal forces, 249 N and 165 N, are exerted in opposite directions on a crate. What is the net horizontal force on the create? Be sure to point to the direction of the net force.
How much force is needed to hold a 7.0 cm diameter hose delivering 440 L/min through a 0.73cm diameter nozzle.
Physics - Classical Mechanics : explained, A student could either pull or push, at an angle of 300 from the horizontal, a 50-kg crate on a horizontal surface, where the coefficient of kinetic friction between the crate and surface is 0.20. The cra..
A long coaxial cable length of L consists of a cylindrical metal sheath of radioys b surrounding a solid conducting wire with radious a. defining voltage to be zero at infinity
One mole of nickel (6E23 atoms) has a mass of 54 grams, and its density is 8.9 grams per cubic centimeter. You have a long thin bar of nickel, 2.0 m long, with a square cross section, 0.12 cm on the side.
A boy tosses a ball in the vertical direction off the side of a cliff. if the initial velcoity of the ball is 15 m/s upward, determine the maximum height sb reached by the ball
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