1. A truck pulls a trailer on a flat stretch of road. The forces acting on the trailer are the force due to gravity (250 000 N downward), the force
exerted by the road (250 000 N upward), and the force exerted by the
cable connecting the trailer to the truck (20 000 N to the right). The
forces acting on the truck are the force due to gravity (80 000 N down-
ward), the force exerted by the road (80 000 N upward), the force exerted
by the cable (20 000 N to the left), and the force causing the truck to
move forward (26 400 N to the right).
a. Draw and label a free-body diagram of the trailer.
b. Draw and label a free-body diagram of the truck.

With i really need the correct answer!

Avery long solenoid of inner radius 2.75 cm creates an oscillating magnetic field of the form = for this solenoid, =0.00425 t and =319 rad/s. (a)what is the maximum value of the induced electric field at a perpendicular distance 1.45 cm from the axis of the solenoid? (b) what is the maximum value of the inducted electric field at a point 5.85 cm perpendicular from the axis of the solenoid?

Sally turns on her cellular telephone to speak to her friend who is located thousands of miles away. which of the following best describes how such a telephone is able to transmit and receive information? a. the cellular telephone transmits, receives, and encodes information using only sound waves. b. the cellular telephone transmits, receives, and encodes information using only electromagnetic waves. c. the cellular telephone transmits information by electromagnetic waves to a receiver which then encodes them and produces sound. d. the cellular telephone transmits information by sound waves to a receiver which then encodes them and produces electromagnetic waves.