A heavy box of mass 50 mathrm{~kg} is moving on a horizontal surface. If co-efficient of kinetic fri

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4-2.Friction

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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

$1470 \mathrm{~N}$

(JEE MAIN-2024)

Solution

$\mathrm{F}_{\mathrm{L}}=\mu_{\mathrm{L}} \mathrm{N}=0.3 \times 50 \times 9.8=147 \mathrm{~N}$

Standard 11

Physics

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(AIIMS-2015)