NCERT Solutions for Class 11 Science Newton’s law of motion and friction 3
Important Board Questions
Newton’s law of motion and friction
NCERT Books for Session 2022-2023
CBSE Board and UP Board
3 Marks Questions & Numericals
A force of 98 N is just required to move a mass of 45 kg on a rough horizontal surface. Find the coefficient of friction and angle of friction?
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F = 98 N, R = 45 × 9·8 = 441 N
μ² = F’/R = 0.22
Angle of friction θ = tan⁻¹ μ = tan⁻¹ 0·22 = 12°24′