A man is running up an escalator. He is moving 5 m/s, but the escalator is also moving up at 3.5 m/s. Find the resultant velocity.

The man's resultant velocity is

8.5 m/s up .

two charges are fixed in place on the x-axis as shown. the charge at x = 0 is negative and has magnitude q = 2 μcoulombs (1 μcoulomb = 10-6 coulombs). the charge at x = d, (d = +12 cm), is positive and has magnitude q = 4 μcoulombs. find a point x = xo along the x-axis at which the electric field is zero.

wire in brush may conduct electricity from cell to drill and vice versa electrc shock possible