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Question1
A photographer in a helicopter ascending vertically at a constant rate of 12.5 m/s accidentally drops a camera out the window while the helicopter is 60.0 m above the ground.
(a) How long will it take the camera to reach ground?
(b) What will its speed be when it hits?
Question2
A 4.130 kg block of wood rests on a steel desk. The coefficient of static friction between the block and the desk is μs = 0.455 and coefficient of kinetic friction is μk = 0.305. At time t = 0, a force F = 11.3 N is applied horizontally to the block. Status the force of friction applied to the block by the table at the follow times-t=0 and t>0
Question3
The Earth's magnetic field has strength of about 0.5 gauss. What magnetic field strength has to be produced by the Helmholtz coils so that the Earth's magnetic field has less than a 1 percent effect on this experiment?
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.
Question: Field and force with three charges? What is the electric field at the location of Q1, due to Q 2 ?
What is the maximum displacement of the bridge deck?
What is the magnitude of the current in the wire as a function of time?
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Evaluate maximum altitude?
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