H2 Physics 4 - Energy and Fields: Work-Energy Theorem on a Rough Surface
What you will learn
- 3 kg box pushed by 20 N at 15 degrees above horizontal on a rough floor with mu_k = 0.25, from rest, over 4 m.
- Vertical balance: N = mg minus F sin theta = 29.43 minus 5.18 = 24.2 N; the upward push component reduces N.
- Friction f = mu_k N = 6.06 N opposes motion; horizontal push = 20 cos 15 = 19.3 N.
Continue H2 Physics Energy & Fields Notes | A-Level 9478
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