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It takes a minimum force of 280N to move a 50 kg crate. What is the coefficient of maximum static friction between the crate and the floor?
a car is traveling at 61.04 mph. the driver applies the brakes and the car decelerates at 1.97 ms2. what is the
A person lifts a 4.7 kg cement block avertical distance of 1.02 m and thencarries the block horizontally a distance of 9.10 m. How much work is done by gravity in the process
Suppose a star experiences an outburst in which its surface temperature doubles but its average density, By what factors do the star's radius and luminosity change
An arc 14.0 cm in length on the circumfrence of a circle subtends an angle of 126 degrees. What is the radius of the cirlce
if 533 what is the minimum diameter of the circular opening from which the laser beam emerges? the earth-moon distance
A rectangular fish tank measures 20 cm by 70 cm by 40 cm high. The tank is filled with water to a depth of 37 cm. What is the total force of the water on the bottom
At one point in space, the electric potential energy of a 10 charge is 34. If a 25 charge were placed at this point, what would its electric potential energy be
A long rope is suspended from the ceiling. Waves are started from the bottom traveling up the rope. It is observed that their speed changes as they move up the rope. Do they get faster or slower? Explain why this occurs.
a ski trail makes a vertical descent of 78.0 m as shown in the figure below . a novice skier unable to control his
At the same instant that a 2.0-kg ball is dropped from 50 m above Earth, a second ball, What is the velocity of the center-of-mass of the two-ball system 0.5 seconds after the balls are released
A plate carries a charge of -2.55μC, while a rod carries a charge of +2.03μC. How many electrons must be transferred from the plate to the rod, so that both objects have the same charge.
A car with a mass of 1.50x10^3 kg starts from rest and accelerates to a speed of 18.0 m/s in 12s. Assume that the force of resistance remains constant at 400-N all through this time. What is the average power developed by the car's engine?
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