Inside a horizontally moving box, an experimenter finds that when an object is placed on a smooth horizontal table and is released, it moves with an acceleration of $10\,m / s ^2$. In this box if $1\,kg$ body is suspended with a light string, the tension in the string in equilibrium position (w.r.t. experimenter) will be$.........\,N$ (Take $g =10\,m / s ^2$ )

Ten one-rupee coins are put on top of each other on a table. Each coin has a mass $m$ Give the magnitude and direction of

$(a)$ the force on the $7^{\text {th }}$ coin (counted from the bottom) due to all the coins on its top.

$(b)$ the force on the $7^{\text {th }}$ coin by the elghth coin,

$(c)$ the reaction of the $6^{\text {th }}$ coin on the $7^{\text {th }}$ coin.

There are four forces acting at a point $P$ produced by strings as shown in figure, point $P$ is at rest. The forces $F_1$ and $F_2$ are respectively

A block of $\sqrt{3}\,kg$ is attached to a string whose other end is attached to the wall. An unknown force $F$ is applied so that the string makes an angle of $30^{\circ}$ with the wall. The tension $T$ is $...........\,N$ :(Given $g =10\,ms ^{-2}$ )

A person used force $(F)$, shown in the figure to move a load with a constant velocity on a given surface Identify the correct surface profile

A rope of mass $5 \,kg$ is hanging between two supports as shown alongside. The tension at the lowest point of the rope is close to ........... $N$ (take, $g=10 \,m / s ^{2}$ )