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?

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

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