A force of $6\; N$ acts on a body at rest and of mass $1\; kg$. During this time, the body attains a velocity of $30\; m / s$. The time for which the force acts on the body is ….. $seconds$

A body of mass $2\, kg$ travels according to law $x = at + bt^2 + ct^3$, where $a = 3\, m/s$, $b = 4\,m/s^2$ and $c = 5\, m/s^3$, then force acting on body at $t = 2\, s$  ……… $N$.

An object of mass $3\,kg$ is at rest. If a force $\vec F\, = \,\left( {6{t^2}\,\hat i\,\, + \,4t\,\hat j} \right)\,N$ is applied on the object, then the velocity of the object at $t = 3\,s$ will be

A body of mass $5\; kg$ is acted upon by two perpendicular forces $8 \;N$ and $6\; N.$ Give the magnitude and direction of the acceleration of the body

Force acts for $20\,s$ on a body of mass $20\,kg$, starting from rest, after which the force ceases and then body describes $50\,m$ in the next $10\,s$. The value of force will be $……….\,N$