Question

A $25$ kg body is resting on a horizontal plane having coefficient of friction $0.2$. A force of $200$N is required to pull the body horizontally. The acceleration developed by the body is:

• A. $0m{s}^{-2}$
• B. $2m{s}^{-2}$
• C. $4m{s}^{-2}$
• D. $6m{s}^{-2}$

Answer 1

The correct option is B $2m{s}^{-2}$

We know Force$=\mu mg$ where $\mu$ = coefficient of friction=$0.2$, $m$=mass of the body =$2$ kg and

$g$= acceleration due gravity=$10m/s^2$

Also we know Force= mass$\times$acceleration

Now comparing both the equation we get

$ma=\mu mg$

$a=0.2\times 10$

thus acceleration $a=2m/s^2$