An approximation for the magnetic field at the edge of a certain C-shaped magnet is Show that this approximation is consistent with Maxwell’s equations in free space.
Find the magnitude and direction of the force on a square loop of current which has sides length b = 10 cm, positioned with its left edge a distance c = 12 cm from the magnet opening, and carrying a current of 2.6 A counterclockwise. Let and a = 30 cm.
If the loop is rotated by an angle 20º about the x axis, how much torque does it experience and it which direction?

A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n

Match each scenario to the form of energy it represents

Aparticle's position is given by x = 3.00 - 9.00t + 3t2, in which x is in meters and t is in seconds. (a) what is its velocity at t = 1 s? (b) is it moving in the positive or negative direction of x just then? (c) what is its speed just then? (d) is the speed increasing or decreasing just then? (try answering the next two questions without further calculation.) (e) is there ever an instant when the velocity is zero? if so, give the time t; if not, answer "0". (f) is there a time after t = 3 s when the particle is moving in the negative direction of x? if so, give the time t; if not, answer "0".