A box is sitting on the floor. The box was then pulled with a force, Ft. The box did not move. The free-body
diagram of the box is shown.
Which describes the motion of the box based on the
resulting free-body diagram?
It is moving up with a net force of 20 N.
It is moving to the right with a net force of 10 N.
It is in dynamic equilibrium with a net force of O N.
It is in static equilibrium with a net force of O N.
F, = 20 N
F, = -10 N
F, = 10 N
F = -20 N

answer; i believe that the correct answer is (d) a very small amount of mass

since you're a real machine, your ama is always less than your ima, because you can never totally eliminate friction.

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation:

the answer is kevlar