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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 stone is dropped at t = 0. A second stone, with twice the mass of the first, is dropped from the same point at t = 179 ms. How far below the release point is the center of mass of the two stones at t = 386 ms
calculate irons temperature changes when a 30-gram piece of iron is dropped into a container of water and gives off 165
An outfielder throws a1.91 kgbaseball at a speed of 68 m/s and an initial angle of54.6degrees. What is the kinetic energyof the ball at the highest point of its motion?
An optometrist has a choice to give a pacient either regular glasses or contact lenses to correct nearsightedness. Usually, regular glasses sit a few centimeters in front of the eye and contact lenses right on the eye. What do you think, the power..
The voltage across a resistor is equal to the product of the current through the resistor and the resistance of the resistor, What is the potential difference of the battery
When a guitar string is sounded along with a 441-Hz tuning fork, a beat frequency of 4.00 Hz is heard. When the same string is sounded along with a 437-Hz tuning fork, beat frequency is 8.00 Hz. What is the frequency of the string.
a bell ringer decides to use a bowling ball to ring the bell. he hangs the 7.3kg ball from the end of a 2m long rope.
An alpha particle (helium nucleus, charge 2e) starts from rest and travels a distance of 1.88 cm under the influence of a uniform electric field of magnitude 12.2 kV/m
When is there no work on an object. For example, a weightlifter picks up a weight, or a kid wearing skates pushes of a wall and moves in the opposite direction. Why is the force in each problem not doing work
A 1200 N uniform boom is supported by a cable perpendicular to the boom, as in Figure P8.28. The boom is hinged at the bottom, and a 2000 N weight hangs from its top. Find out the tension in the supporting cable and the components of the reaction ..
a uniform piece of aluminium is 4m by 4m and 2cm thick. a 1m by am square piece is cut out from it. the center of the
You have a flashlight that uses 0.75 watts of power and requires 1.5 volt battery, How many joules of energy are used by the flashlight in 15 minutes
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