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Identical point charges Q are placed at each of the four corners of a 3.0 m * 4.0 m rectangle. If Q = 40 µC, what is the magnitude of the electrostatic force on any one of the charges
A charged particle ( mass = 4.0 µg, charge = 5.0 µC ) moves in a region where the only force on it is magnetic. What is the magnitude of the acceleration of the particle at a point where the speed of the particle is 5.0 km/s, the magnitude of the magnetic field is 8.0 mT, and the angle between the direction of the magnetic field and the velocity of the particle is 60°?
What happens to the force between two charged metal spheres in a vacuum if the charge on each is doubled and the distance between them in multiplied by three?
Suppose the Earth (mass 6.0 x 10 kg) has an excess of
positive charge and the Moon (mass 7.3x 1022 kg) has an equal
excess of positive charge. Calculate the size of the charge
required so that the electrostatic force between them
balances the gravitational force between them.
An electron moves in uniform magnetic field with a speed of 5·106 m/s along the x axis. The magnetic field strength is 0.050 T, directed at an angle of 45° to the x axis and lying in the xy plane. Calculate the magnetic force 𝐹 on and acceleration 𝑎 of the electron.
Determine the direction and magnitude of the electric field at point P. The charges are
separated by a distance 2𝑎, and point P is a distance 𝑥 from the midpoint between the two
charges. Express your answer in terms of 𝑄, 𝑥, 𝑎, and 𝑘.
What is the magnitude of the electric force of attraction between an iron nucleus (𝑞 = +26𝑒)
and its innermost electron if the distance between them is 1.5 × 10−12 m?
A 440 W fan uses a motor to spin the 3.8 kg blades up to a speed of 21 m/s in 3.3 s using this electrical input, what is the efficiency of the motor?
Zamboni has broken down and is being pulled across the ice(consider a frictionless) The workers pull the Zamboni with a rope which makes an angle of 10.0• with The horizontal force. The force of tension in the rope due to the pole of the two workers is 47.9 and if the repair bay is 40.0 M away will the workers be able to make it if they expended 2.00 x103 J of work?
The un-damped system has angular frequency w=15Hz.The system is then damped withdamping constant y=5Hz.at what angular frequency must the system be driven in order to achieve the maximum amplitude ?
