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1. A 2.5 kg basketball is dropped from the top of a building. Its acceleration is found to be 9.4 m/s^2 as it drops to the ground. What is the force of air friction on the balls as it falls?
2. A 30 kg box sits on the floor. It needs 275 n of force to get it moving. Once it is moving it only takes 225N of force. What are the coefficients of static and kinetic friction?
for cindys car here are the coefficients of friction between the tires and the road static .700 kinetic .500suppose
a block of mass m 0.2kg in simple harmonic motion has an amplitude of 3.5 cm and a maximum speed of 70 cms. what is the
Calculate the work done by the electric field force on an electron when the electron moves from point O, where the potential is -30.0 V, to point F,
Gas is contained in an 6.5 L vessel at a temperature of 20°C and a pressure of 9.8 atm. How many molecules are in the vessel
The speed of an arrow fired from a compound bow is about 29 m/s. An archer sits astride his horse and launches an arrow into the air elevating the bow at an angle of 35 degrees above the horizontal, What is the arrow range
The rectangular loop in the drawing consists of 75 turns and carries a current of I = 4.9 A. compute the magnitude of the net torque exerted on the loop
How much energy is necessary to bring the system back
A mirror produces an image that is located 48.00 cm behind the mirror when the object is located24.00 cm in front of the mirror. What is the focal length of the mirror?
An AC source with an output rms voltage of 34.5 V at a frequency of 60.0 Hz is connected across a 10.2-µF capacitor. Find the maximum current in the circuit
A thin spherical shell of mass 0.450 kilogram and diameter 0.230 meter is filled with alcohol (ρ = 806 kg/m3). Evaluate the acceleration of the alcohol-filled shell as it starts to rise toward the surface of the water
A sound wave is travelling trough a fresh water pool with a speed of 1482 m/s. what is the pressure amplitude of the wave
A 5.40 nC point charge is on the x axis at x = 1.25 meter. Find what must be the charge Q for the resultant electric field at the origin to be 50 N/C in the +x direction
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