Question

A block is lying on an inclined plane which makes 60° with the horizontal. If coefficient of friction between block and plane is 0.25 and $g = 10m/s^{2}$, then acceleration of the block when it moves along the plane will be

• A. $2.50m/s^{2}$
• B. $5.00m/s^{2}$
• C. $7.4m/s^{2}$
• D. $8.66m/s^{2}$

Answer 1

Answer: (C)

$7.4m/s^{2}$

Answer 2

$a = g(\sin\theta - \mu\cos\theta) = 10(\sin 60{^\circ} - 0.25\cos 60{^\circ})$

$a = 7.4\mspace{6mu} m/s^{2}$