A box when hung from a spring balance shows a reading of $50 \,kg$. If the same box is hung from the same spring balance inside an evacuated chamber, the reading on the scale will be

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

In the setup shown, a $200\, N$ block is supported in equilibrium with the help of strings  and a spring. A point $O$, the strings knotted. Extension in the spring is $4\, cm$. Force   constant of the spring is closest to ………… $N/m$ $[g = 10\, m/s^2]$

A man is standing at a spring platform. Reading of spring balance is $60\, kg$ wt. If man jumps outside platform, then reading of spring balance