Why Is the Net Force on Both Cars Zero Despite Different Speeds?

Join the discussion
Registration is free. Ask a follow-up in this thread, or start your own.
Sign up Log in
1 reply · 2K views
Skittles
Messages
4
Reaction score
0
I don't understand this:

A slow car moves at a steady 10 km/hr down a straight highway while another car zooms past at a steady 120 km/hr. Which car is has the greater net force on it?

The answer is neither, because the net force on each car is zero.

Why is it zero?
 

Discussion

Physics news on Phys.org
Look at the definition of force.