Question

a 20kg crate is pushed across a frictionless floor with a force of 80N if the crate starts from rest, what will be it's speed after it has been pushed for 5.0m?

Answer 1

1. Work = 80 N * 5.0 m
2. Change in KE = Work
3. Speed = √(2 * Change in KE / Mass)
4. Substitute values: Speed = √(2 * (80 N * 5.0 m) / 20 kg)
5. Simplify: Speed = √(800 N * m / 20 kg)
6. Calculate: Speed ≈ √40 m²/s²
7. Final Result: Speed ≈ 6.32 m/s