A 3 kg block is acted on by a 25 N force that acts 37" below the horizontal, as shown in the Fig 1. Take Mi = 0.2 and y, = 0.5, (a) Does the block
move if it is initially at rest? (b) If it moves to the right, what is its
acceleration?
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Certain bacteria (such as aquaspirillum magnetotacticum) tend to swim toward the earth’s geographic north pole because they contain tiny particles, called magnetosomes, that are sensitive to a magnetic field. if a transmission line carrying 100 a is laid underwater, at what range of distances would the magnetic field from this line be great enough to interfere with the migration of these bacteria? (assume that a field less than 5% of the earth’s field would have little effect on the bacteria. take the earth’s field to be 5.0 * 10-5 t, and ignore the effects of the seawater.)