JEE Mains · Physics · STD 11 - 4.2 friction
A heavy box of mass \(50 \mathrm{~kg}\) is moving on a horizontal surface. If co-efficient of kinetic friction between the box and horizontal surface is \(0.3\) then force of kinetic friction is _______.
- A \(14.7 \mathrm{~N}\)
- B \(147 \mathrm{~N}\)
- C \(1.47 \mathrm{~N}\)
- D \(1470 \mathrm{~N}\)
Answer & Solution
Correct Answer
(B) \(147 \mathrm{~N}\)
Step-by-step Solution
Detailed explanation
\(\mathrm{F}_{\mathrm{L}}=\mu_{\mathrm{L}} \mathrm{N}=0.3 \times 50 \times 9.8=147 \mathrm{~N}\)
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