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When kicking a soccer ball, a player accelerates (a) her lower leg at 4.5radians/s2 for0.8 s. If the final angular velocity (wf) of her leg was 1.4 radians/s, what was the initial angular velocity (wi) of her leg?
Most of us know intuitively that in a head-on collision between a large dump truck and a subcompact car, you are better off being in the truck than in the car. Why is this, find the average force on the truck driver from the seatbelt
A steel wire of mass 0.400kg and length 0.640m supports a 102 kg block. The wire is struck exactly at its midpoint causing a small displacement. How long does it take the peak of this displacement to reach the top of the wire.
A capacitor consists of two closely spaced metal conductors of large area, separated by a thin insulating foil. Calculate the amount of energy stored in the capacitor
Runner A is at first 5.4 km west of a flagpole and is running with a constant velocity of 2.6 km/h due east. Runner B is initially 3.0 km east of the flagpole and is running with the constant velocity of 8.8 km/h due west. What would be the distance ..
A 60 ohm resistor is connected in series with a 30x10^-6 capacitor and a generator having a maximum voltage of 120 volts, what is the phase angle of the circuit
An iron bar 40 cm long is braised to a copper bar 50 cm long and of the same diameter. What is the heat flow down the rod if its cross-sectional area is 2.50 cm2
A tennis player receives a shot with the ball (0.0600 kg) traveling horizontally at 56.0 m/s and returns the shot with the ball traveling horizontally at 42.0 m/s, What work does the racket do on the ball
two stationary positive point charges charge 1 of magnitude 3.80nc and charge 2 of magnitude 1.60nc are separated by a
An organ pipe open at both ends is vibrating with n=5 with a frequency of 646 Hz. The length of the pipe is 0.5 m. Determine the speed of sound in air in the pipe
A piece of wood is 0.600 m long, 0.250 m wide and 0.080 m thick. Its density is 600 kg/m3. What volume of iron (ρI = 7.8 x 103 kg/m3 ) should be fastened underneath it so the wood now floats in water (ρw = 1000 kg/m3 ) with its top even by the water ..
A soccer player kicks the ball off the ground at an angle ? above the horizontal. The ball is in the air for 3.0 seconds, Find the soccer ball's initial horizontal (vox) velocity component
When light of wavelength 370 nm falls on a barium surface, electrons having a maximum kinetic energy of 0.86 eV are emitted. the frequency corresponding to the cutoff wavelength
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