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A wheel is mounted on a stationary axle which we can assume frictionless. As a result, the wheel can turn freely but cannot translate. The wheel can be described as two concentric rings of masses 1 kg and 0.5 kg and radii 50 cm and 85 cm. You wrap a string of negligible mass around the outer ring and pull on it, increasing the angular speed of the wheel from 0 to 8 revolutions per second. Determine:
a) How much work is done by you on the pulling;
b) If your hand has moved 3 meters (that is the amount of string that you unwrap in the pulling), how much is the pulling force?.
The work fuction of a particular substance is 7.81*10^-19 J. What is the photoelectric cutoff wavelength for this material
A soccer player 'heads' the size 5 ball deflecting it by 46.0°, and keeps its speed of 15.90 m/s constant. A size 5 ball has a mass of approximately 0.421 kg. What is the magnitude of the impulse which the player must impart to the ball.
A 12.0 kg box is pulled along a horizontal surface by a force Fp at a 30° angle above the horizontal. Calculate the acceleration of the box assuming a force of magnitude 45 N is applied at the 30° angle
The flywheel in a car is a solid cylinder with a mass of 100 kg, a radius of 11 cm, and a length of 5.0 cm. What is the kinetic energy of the cylinder
A 15 kg box is pulled horizontally by a 20 N force on a frictionless surface. What is the change in kinetic energy of the box
Elements that appear in the same column of the periodic table often share similar chemical properties. In the case of the alkaline earth metals, calculate the path radius of the Ca ion
A series RCL circuit contains a 48.0-? resistor, a 2.70-?F capacitor, and a 3.75-mH inductor. When the frequency is 2590 Hz, what is the power factor of the circuit
You are to program a robotic arm on the assembly line to move in a xy-plane. Its first displacement is; its second displacement is, of magnitude 6.51 and direction 62.7 measured in the sense from +x-axis toward -y-axis. The resultant of the two displ..
Design an audio amplifier using a JFET and a 20-volt power supply. The amplifier is to have a gain of 50
Light from a helium-neon laser (? = 633 nm) passes through a circular aperture, What is the diameter (in mm) of the hole
rocket, initially at rest on the ground, accelerates straight upward from rest with constant acceleration 44.1m/s^2. Find the maximum height ymax reached by the rocket
An electron and a proton are each accelerated through a potential dierence of 10.0 MV. Are the particles moving at relativistic speeds
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