The drawing shows a 18.58 kg crate that is
initially at rest. note that the view is one looking
down on the top of the crate. two forces, f 1
and f 2, are applied to the crate, and it begins
to move. the coefficient of kinetic friction
between the crate and the floor is 0.54.
determine the magnitude of the acceleration of
the crate (m/s2).

f1: 88n
f2: 54n
the angel between f1, f2 : 55

Which explanation describes the forces involved for a person to walk down the sidewalk? a. the person's feet push backward on the sidewalk; the sidewalk pushes backward on the person. b. the person's feet push forward on the sidewalk; the sidewalk does not push on the person. c. the person's feet push backward on the sidewalk; the sidewalk pushes forward on the person. d. the person's feet push forward on the sidewalk; the sidewalk pushes forward on the person.

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f

Two 1.20-m nonconducting wires meet at a right angle. one segment carries + 2.50 µc of charge distributed uniformly along its length, and the other carries - 2.50 µc distributed uniformly along it, as shown in fig. 21.50. ( a. find the magnitude and direction of the electric field these wires produce at point p, which is 60.0 cm from each wire. ( b. if an electron is released at p, what are the magnitude and direction of the net force that these wires exert on it?