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Question1

A wire has a mass of 1.00 g/cm is positioned on a horizontal surface with the coefficient of friction of 0.250. A current of 3A flows eastward inside the wire as it is moved to the north horizontally. Calculate the direction and least magnetic field experiences by the wire.

Question2
Suzie (of mass 76 kg) is roller-blading down sidewalk going 50 miles per hour. She notices a group of workers down the walkway who have unexpectedly blocked her path, and she makes a quick stop in 1.2 seconds. What is Suzie's average acceleration?
Answer in units of m/s2

Question3
The equation of a transverse wave on a string is
y = (5.2 mm) sin [(21 m-1) x + (550 s-1) t]
The tension in a string is 21 N.

(a) What is wave speed?

(b) Find out the linear density of this string in grams per meter

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