Select correct statement regarding pseudo force
It is electromagnetic in origin
Newton's $3rd$ law is applicable for it
It is a fundamental force
It is used to make Newton's law applicable in noninertial frame
Choose the correct statement
A rope of mass $5\,kg$ is moving vertically in vertical position with an upwards force of $100\,N$ acting at the upper end and a downwards force of $70\,N$ acting at the lower end. The tension at midpoint of the rope is $............\,N$
The acceleration of $10\,kg$ block when $F =30\,N$
An insect crawls up a hemispherical surface very slowly (see the figure). The coefficient of friction between the insect and the surface is $1/3$. If the line joining the centre of the hemispherical surface to the insect makes an angle $\alpha $ with the vertical, the maximum possible value $\alpha $ is given by