Question about forces

Let’s say there’s a cube sliding across a frictionless platform. It then hits a wall. At the exact instance it hits the wall, what’s the net force and what are all the forces acting on the cube?

1 Like

Hi PinaColada!
At the exact moment the block contacts the wall there will be 3 forces acting on the block:

  • Weight (acting down)
  • Normal Force from the platform (acting up) & equal to the weight (I’m assuming it’s a horizontal platform)
  • Normal Force from the wall (acting in the opposite direction the block was moving) <-- This is the net force because it’s unbalanced.
1 Like

Thanks Peter! I just wanted to have that cleared up haha

Fiveable Logo

2550 north lake drive
suite 2
milwaukee, wi 53211



about for students for parents for teachers for schools & districts content team privacy contact


🥇 2020 Fiveable Olympics study plans upcoming events trivia hypertyper resources cram passes


community tiktok discord twitter instagram facebook careers

*ap® and advanced placement® are registered trademarks of the college board, which was not involved in the production of, and does not endorse, this product.

© fiveable 2020 | all rights reserved.