Consider a block and trolley system as shown in figure. If the...

Consider a block and trolley system as shown in figure. If the coefficient of kinetic friction between the trolley and the surface is $0 . 04$ , the acceleration of the system in $m{s}^{- 2}$ is: (Consider that the string is massless and unstretchable and the pulley is also massless and frictionless) :

Options

A $3$
B $4$
C $2$
D $1 . 2$

Correct answer

C. $2$

Step-by-step solution

Consider a block and trolley system as shown in figure. If the coefficient of kinetic friction between the trolley and

Maximum kinetic friction acting, ${f}_{k} = \muN = 0 .04 \times 20g = 8$ Newton

Therefore, acceleration of the system will be $a = \dfrac{60 - 8}{26} = 2m{s}^{- 2}$

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