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The uniform rod AB of weight W is released from rest when ß = 70°. Assuming that the friction force between end A and the surface is large enough to prevent sliding, determine immediately after release
(a) the angular acceleration of the rod,
(b) the normal reaction at A, (c) the friction force at A.
The magnetic field of the earth at a certain location is directed vertically downward and has a magnitude of 50.0 µT. Find the direction and magnitude of the magnetic force the field exerts on the proton
A ball is allowed to roll from rest down an inclined plane, and the distances are marked every 1.9 s. If the second mark is made 1.6 m from the starting point, where is the first mark and where is the fourth mark?
An object starts from rest at t= 2 s at an initial position of x = 7.2 m and moves with constant acceleration. What is the magnitude of the acceleration of the object
Bob holds a ball at a height of 2.5 m above the ground and tosses it vertically upward with an initial speed of 3.5m/s. How long does it take his ball to reach the ground
now three masses m1 3.1 kg m2 9.3 kg and m3 6.2 kg hang from three identical springs in a motionless elevator. the
one end of a boat having mass 32 kg touches the shore(the boat perpendicular to shore) a 4kg dog initially stands on the other end of the boat. find how far the dog is then from the shore
The solar panels on the roof of a house measure 4.0 m by 5.2 m. Assume they convert 12% of the incident EM wave's energy to electrical energy. What average power do the panels supply when the incident intensity is 1.0 kW/m2 and the panels are perpe..
The starter motor of a car engine draws a current of 160A from the battery. The copper wire to the motor is 4.80mm in diameter and 1.2 m long. How much charge passes through the starter motor
A 1432.0 g mass is on a horizontal surface with μk = 0.44, Calculate the distance the spring was compressed. What is the velocity of the mass as it loses contact with the spring
Calculate the gyrofrequency of an electron in Earth's magnetic field, having a value of ~ 35 A-m-1. Determine the electron density values required to produce a zero refractive index for the case of propagation parllel to Earth's magnetic field at a f..
Three objects were thrown from top of a building. First one was thrown with 20 m/s horizontally. The second one was thrown vertically upward with an initial speed of 20 m/s. The third object was thrown at an angle 30o to the horizontal. When the o..
Two identical 19.1?kg spheres of radius 12.7cm are 35.7cm apart (center-to-center distance). If they are released from rest and allowed to fall toward one another, what is their speed when they first make contact
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