M Karim Physics Numerical Book Solution Class 11 Review
┌─────────────────────────────────────────────────────────────┐ │ Chapter 5 – Friction M. Karim Prob 5.9 │ ├─────────────────────────────────────────────────────────────┤ │ Problem: A block of mass 5 kg rests on a rough horizontal │ │ surface (μ = 0.4). A horizontal force of 18 N is applied. │ │ Find friction force and acceleration. (g = 10 m/s²) │ ├─────────────────────────────────────────────────────────────┤ │ DATA: m = 5 kg, μ = 0.4, F_app = 18 N, g = 10 m/s² │ │ │ │ STEP 1: Max static friction │ │ f_max = μ × m × g = 0.4 × 5 × 10 = 20 N │ │ │ │ STEP 2: Compare applied force │ │ F_app (18 N) < f_max (20 N) → block does NOT move. │ │ │ │ STEP 3: Actual friction = applied force (static eq.) │ │ ∴ f = 18 N and a = 0 m/s² │ │ │ │ ✔️ Common Error: Students wrongly take f = μ×N = 20 N │ │ even when block is stationary. │ │ │ │ ANSWER: Friction = 18 N, Acceleration = 0 │ └─────────────────────────────────────────────────────────────┘
Hi Baraa,
This is absolutely the best SQL course on the planet!
Your educational skills, summaries, make every information looks effortless and simple to learn.
You really deserves to reach more than 1 M subscribers on Youtube, and even to give lectures and make curriculum in global universities!
Thanks for your efforts to make a great content, and I am always looking for further courses.
Hello Baraa,
Hope you are doing great !
I was searching for the best SQL guide since a year.
I did many sql courses but you have the best contents ever.
This is truly the best SQL course.
Thank you so much for creating such an amazing SQL course! The content is clear, engaging, and incredibly helpful. I truly appreciate all the effort you put into making it so comprehensive and accessible. You've made learning SQL enjoyable and practical—thank you for this great resource!