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Let's look at the details of eddy-current braking. A square loop of length l on each side, is shot with velocity v0 into a uniform magnetic field B. The field is perpendicular to the plane of the loop. The loop has mass m and resistance R, and it enters the field at t = 0 s. Assume that the loop is moving to the right along the x-axis and that the field begins at x = 0 m.
(a) Find an expression for the loop's velocity as a function of time as it enters the magnetic field. You can ignore gravity, and you can assume that the back edge of the loop has not entered the field.
(b) Calculate and draw a graph of v over the interval 0s< t< 0.04s for the case that v0 = 10 m/s, l = 10 cm, m = 1.0 g, R = 0.0010 ohms, and B = 0.10 T. The back edge of the loop does not reach the field during this time interval.
What is the total momentum of system after the collision.
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A 56.0 kg ice skater spins about a vertical axis by her body with her arms horizontally outstretched, making 1.50 turns each second. The distance from one hand to the other is 1.5 m . Biometric measurements indicate that each hand typically makes ..
You've been walking at a steady, and rope pulls up on the sled at a 21 angle. You estimate that the mass of the sled, with your friend on it, is 64 and that you're pulling with a force of 84.0.
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