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The drill used by most dentists today is powered by a small air-turbine that can operate at angular speeds of 320000 rpm. These drills, along with ultrasonic dental drills, are the fastest turbines in the world - far exceeding the angular speeds of jet engines. Suppose a drill starts at rest and comes up to operating speed in 2.16 s. Calculate the angular acceleration produced by the drill, assuming it to be constant. Give answer in rev/s.
How many revolutions does the drill bit make as it comes up to speed? Do not enter unit.
The gravitational force between two masses M and m seperated by a distance r is 40 N. What is the new force when this distance is halved
A projectile is fired such that its horizontal range is equal to 2.0 times its maximum height. Find the angle the projectile was fired at
What is the horizontal component of velocity
The specifications for a ceiling fan you have just bought indicate that the total moment of inertia of its blades is 0.13 kg · m2, What is the angular acceleration of the blades
A rock is thrown on earth with an initial horizontal velocity and it hits the ground at x meters away from the point where the stone is thrown. how much larger is the new planet's mass relative to earth
q1. it is 140 cm from your eyes to your toes. youre standing 186 cm in front of a tall mirror. how far is it from your
A pendulum clock that works perfectly on Earth is taken to the Moon. (a) Does it run fast or slow there? (b) If the clock is started at 12:00 midnight, what will it read after one Earth day (24.0 h)? suppose that the free-fall acceleration on the ..
What is an average velocity of the rock
The woman then starts walking clockwise around the rim at .75 rad/s. in what direction and with what angular speed does the turntable rotate.
Electromagnetic waves and sound waves can have the same frequency. What is the wavelength of 1.10 kHz ectromagnetic wave
A father pulls his young daughter on a sled with a constant velocity on a level surface a distance of 10m. how much work does the father do
A 2-kg book with no initial velocity slides down an inclined plane with an angle of 20 degrees a total of 2 meters. The force of friction does 10 Joules of work, what is the final kinetic energy of the system as the book reaches the bottom of the ..
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