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1. A grindstone of radius 4.0 m is initially spinning with an angular speed of 8.0 rad/s. The angular speed is then increased to12 rad/s over the next 4.0 seconds. Suppose that the angular acceleration is constant. during how many revolutions does the grindstone turn through the 4.0-second interval?
2. A wheel of radius 0.5 m rotates with a constant angular speed about an axis perpendicular to its center. A point on the wheel that is 0.2 m from the center has a tangential speed of 2 m/s. Decide the tangential speed of a point 0.3 m from the center of the wheel.
3. On an amusement park ride, passengers are seated in a horizontal circle of radius 7.5 m. The seats begin from rest and are uniformly accelerated for 21 seconds to a maximum rotational speed of 1.4 rad/s. What is the tangential acceleration of the passengers through the first 21 s of the ride?
1. an observer stands between two sound sources. source a is moving away from the observer and source b is moving
You want to lift a heavy box with a mass of 98 kg using a two pulley system. If you lift the box by 1 m, how much work is done by gravity
A box of mass 2.1 kg is on a horizontal surface. The coefficient of friction between the box and the surface is 0.32. Find the acceleration of the box
A child throws a softball straight up with an inital speed10m/s. Find the maximum height above the child's hand that the ball reaches.
What force must be applied to push a carton weighing 310 N up a 16° incline, if the coefficient of kinetic friction is 0.41
A simple pendulum makes 140 complete oscillations in 2.50 min at a location where g = 9.80 m/s2. Find the period of the pendulum
Coherent light with wavelength 592 nm passes through two very narrow slits, and interference pattern is observed on the screen a distance of 3.00 {rm m} from the slits. The first-order bright fringe is the distance of 4.84 {rm mm} from the center o..
Two circular rods, one copper and one steel, are joined end to end. Each rod is 0.750 meter long and 1.50 centimeter in diameter. what are the strain and Elongation
A particle of charge Q is fixed at the origin of an xy coordinate system. At t = 0 a particle (m = 0.897 g, q = 3.51 µC is located on the x axis at x = 15.4 cm, moving with a speed of 72.2 m/s in the positive y direction. For what value of Q (in ?..
A 15 g bullet traveling at 485 m/s strikes a 0.9 kg block of wood that is balanced on a table edge 0.7 m above ground. If the bullet buries itself in the block, find out distance D at which the block hits the floor.
a find an expression for the classical turning points of a quantum harmonic oscillator.b calculate the probability for
A laser beam is traveling through an unknown substance. When it encounters a boundary with air, the angle of reflection is 27.9° and the angle of refraction is 39.0°. What is the speed of light in the substance
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