Question

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

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

Answer 1

Answer: (B)

25 N

Answer 2

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