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Physics Question on Friction

Calculate the acceleration of the block and trolly system shown in the figure The coefficient of kinetic friction between the trolly and the surface is 0.05.(g=10 m/s20.05. (g = 10 \,m/s^{2}, mass of the string is negligible and no other friction exists

A

1.25 m/s21.25\,m/s^{2}

B

1.50 m/s21.50\,m/s^{2}

C

1.66 m/s21.66\,m/s^{2}

D

1.00 m/s21.00\,m/s^{2}

Answer

1.25 m/s21.25\,m/s^{2}

Explanation

Solution

a=20−512a=\frac{20-5}{12}
=1.25 m/s2=1.25\,m/s^{2}