A car weighing 5000 N is traveling along a straight level road ...

[lb_gilbert]

A car weighing 5000 N is traveling along a straight level road powered by a forward drive force of 500 N. The force of air resistance is 200 N, and rolling resistance is 100 N. The car's acceleration is
 
  A) in the backward direction.
  B) in a direction that is sideways to the car.
  C) in the downward direction.
  D) zero.
  E) in the forward direction.

Question 2

Radio waves are produced by
 
  A) nuclear vibrations.
  B) molecules in thermal motion.
  C) electrons orbiting around the nucleus in atoms.
  D) electric currents oscillating in human-made electronic devices.
  E) mechanical oscillators that move air back and forth.

[tofugiraffe]

Answer to Question 1

E

Answer to Question 2

D

[lb_gilbert]

TYSM

[mohan]

Excellent