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The coefficient of static friction between the tires of a car and a horizontal road is 0.450. As the car brakes, what is the magnitude of the maximum acceleration of the car? Assume the net force on the car is the maximum static friction force. What is the minimum distance in which the car can stop if its speed is 31.0 m/s before the brakes are applied?
directed into the plane of the computer screen as shown in the figure. Identify the magnitude and direction of the resultant magnetic field at P.
A piece of luggage is being loaded onto an airplane by way of an inclined conveyor belt. calculate the work done on the bag
An 80.0 kg painter climbs a 2.45 m ladder that is at an angle of 25 degrees with a vertical wall. What is the work done by gravity as the painter climbs the ladder
how fast is the mass moving when leaves the spring. Two forces, and , act at a point. has a magnitude of 9.00 and is directed at an angle of 65.0 degrees above the negative x axis in the second quadrant. has a magnitude of 6.00 and is directed at a..
In a transformer, the voltage across the primary coil is 120 V rms, and the voltage across the secondary coil is 10 kV rms (i.e. 10 000V). What is the impedance of the secondary coil
A 1500 kg car increases its speed from 15 m/s to 18 m/s in 15 seconds. What is the resultant work done on the car
pivot without friction about the point O. This pendulum is released from rest in a horizontal position, How far does the block move before coming to rest
A woman inside an elevator is standing on a scale. Before the elevation it starts moving the scale shows 50 kg, calculate the acceleration of the elevator if when it starts moving upward the scale reads 70kg. What will the reading of the scale be ..
A high-voltage transmission line with a resistance of 0.30 /km carries a current of 1050 A, What is the power loss due to resistance in the line
You measure the activity of a radioactive sample, then wait a few days and measure it again. What is the half-life of the substance
assume that adults have iq scores that are normally distributed with a mean of 105 and a standard deviation of 20. find
A 280 block on a 58 long string swings in a circle on a horizontal, frictionless table at 90.0 . What is the speed of the block.
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