How much friction force sholud the brake apply
The 1.8 kg, 20 cm diameter disk in the figure below is spinning at 240 rpm. How much friction force must the brake apply to the rim to bring the disk to a halt in 2.5 s?
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A string under a tension of 59 N is used to whirl a rock in a horizontal circle of radius 3.3 m at a speed of 16.2 m/s. The string is pulled in, and the speed of the rock increases. When the string is 1.158 m long and the speed of the rock is 78.3
One travels at 5.3 cm/s and the other at 3.99999 cm/s. When the first one crosses the finish line, how far behind is the second one?
An electron accelerated from rest through a voltage of 350 V enters a region of constant magnetic field. If the electron follows a circular path with a radius of 28 cm, what is the magnitude of the magnetic field?
An electron is inside a solenoid, 28 from the solenoid axis. It experiences an electric force of magnitude 1.3 fN. At what rate is the solenoid's magnetic field changing?
What are some measures that health care professionals can take to prevent malpractice claims? Do you feel that the threat of a malpractice claim actually affects how a health care professional practices?
What happens when you are handed the wheel? You start the wheel spinning counterclockwise as seen from overhead. What happens now?
A 140 kg crate is in an elevator traveling downward and slowing down at 1 m/s2. Find the normal force exerted on the crate by the elevator.
If a 100 kg man hangs from a 50 kg barbell while another man pulls him and the barbell upwards with a force of 1700 N, what is the approximate net force of this system?
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