A block of mass 10, kg is placed on a rough horizontal surface having coefficient of friction

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4-2.Friction

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A block of mass $10\, kg$ is placed on a rough horizontal surface having coefficient of friction $\,\mu = 0.5$. If a horizontal force of $100\, N$ is acting on it, then acceleration of the block will be ....... $m/s^2$

A

$0.5$

B

$5$

C

$10$

D

$15$

(AIPMT-2002)

Solution

$(b)$ $a = \frac{{{\rm{Applied\, force – Kinetic \,friction}}}}{{{\rm{mass}}}}$ $ = \frac{{100 – 0.5 \times 10 \times 10}}{{10}} = 5m/{s^2}$

Standard 11

Physics

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