Question

A body of mass $5kg$ is suspended by a spring balance on an inclined plane as shown in figure. The spring balance measure

• A. $50N$
• B. $25N$
• C. $500N$
• D. $10N$

Answer 1

The correct option is B $25N$

Acceleration of the body down the rough inclined plane $=g\sin \theta$
$\therefore$ Force applied on spring balance
$=mg\sin \theta$
$=5\times 10\times \sin {30}^{\circ }$
$=5\times 10\times \frac{1}{2}=25N$