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Two positive point charges, Q = 80 nC and q = 45 nC are held at rest one directly above the other a distance 17 cm apart. The top charge, q, has a mass m = 2.5 x 10-4 kg.
The bottom charge, Q, is held stationary and the top charge is released (initally from rest).
What will be the smallest distance between the two charges after the top charge is released?
A block of mass 2.0 kg is pushed against a vertical wall by a horizontal push (P) of 50.0 N. The block does NOT move. Assuming that the coefficient of the static friction, k, is equal to 0.60. Find the force AND the direction of the friction.
A potter's wheel having a radius 0.48 m and a moment of inertia of 10.4 kg · m2 is rotating freely at 48 rev/min. The potter can stop the wheel in 4.5 s by pressing a wet rag against the rim and exerting a radially inward force of 65 N. Find the effe..
Consider three identical metal spheres, A, B, and C. Sphere A carries a charge of +3q. Sphere B carries a charge of -q. compute the ratio of the final charge on sphere
A pendulum makes 24 oscillations in 39s. The period is 1.6 s 1. Find the pendulum's length
A 0.5 kg block of ice is sliding by you on a very slippery floor at 2.5m/s. As it goes by, you give it a kick perpendicular to its path. Your foot is in contact with ice block for 0.0025 seconds.
A uniform rectangular bookcase of height 1.63 m and width 1.03 m is to be pushed at a constant velocity across a level floor. The bookcase is pushed horizontally at its top edge, at the distance H above the floor.
Calculate the direction, magnitude and line of action of the vertical and horizontal components of hydrostatic force acting on a surface.
A projectile is fired at v0 = 394.0 m/s at an angle of θ = 64.2o with respect to the horizontal, How far will the projectile travel in the horizontal direction, R
A person is riding a bicycle, and its wheels have an angular velocity of +23.0 rad/s. What is the angular acceleration of each wheel
A metal wire of resistance 2.20 multiply.gif 10-8 omegacap.gif is cut into four equal pieces that are then connected side by side to form a new wire the length of which is equal to one-fourth the original length
Flying due east, the plane flies with the rotation of the Earth, while flying due west, it flies against the rotation. Will the flight times be the same? Different? Why?
A two-stage rocket moves in space at a constant velocity of +4940 m/s. The two stages are then separated by a small explosive charge placed between them. Immediately after the explosion the velocity of the 1000-kg upper stage is +5930 m/s.
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