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Question1
Assume a 67-kg boy and a 44-kg girl use a massless rope in a tug-of-war on an icy, resistance-free surface. If an acceleration of the girl toward the boy is 3.0 m/s2, find out the magnitude of an acceleration of the boy toward the girl.
Question2
The mailman brought Ralph's lead ball. The hinged 9m drawbridge to Ralph's house collapses as he is one meter from mailbox (attached to the end of a drawbridge). Cable is attached 7m horizontally from wall at an angle of 30 above the horizontal. Mass of mailbox with lead ball is 100kg. Weight of drawbridge (center of mass is 5m from wall) is 2000N, and Ralph has mass 25kg. What is a tension in the cable?
A sphere of radius R is uniformly charged to a total charge of Q. It is made to spin about an axis that passes through its center with an angular speed ω. Find the magnitude of the resulting magnetic field at the center of the sphere.
A resistor is in the shape of a cube, with each side of resistance R . Find the equivalent resistance between any two of its adjacent corners.
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Evaluate maximum altitude?
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