- #1
tennishaha
- 21
- 0
Homework Statement
A very heavy wall moving at 60mph, a ball moving same direction at 120 mph.
What is direction and speed of ball after ball hit wall.
Homework Equations
I am thinking to use the momentum conservation: mass of ball*velocity of ball+mass of wall*velocity of wall don't change
The Attempt at a Solution
because the mass of wall is large, so the velocity of wall doesn't change after the hit, so does the velocity of ball (based on the conservation of momentum), so the ball still moves at 60mph? I feel i am wrong but i don't know how to prove myself wrong, thanks