From the following graph,find the magnitude of the negative force in $N$.

The engine of a jet aircraft applies a thrust force of $10^5\, N$ during take-off and causes the plane to attain a velocity of $1\, km/s$ in $10\, s$. The mass of the plane is:

State Newton's second law of motion.

$A$ constant force $\overrightarrow F = F_x\hat i + F_y\hat j$ acts on a body of mass $5\, kg$. At $t = 0\, s$, its velocity is $\overrightarrow v = (6\hat i - 2\hat j)\, m/s$ and at $t = 10\, s$, its velocity is $\overrightarrow v = 6\hat j\, m/s$. Find the force $\overrightarrow F$.

The velocity of a body of mass $2 \, kg$ as a function of $t$ is given by $\vec{v}(t) = 2t \hat{i} + t^2 \hat{j}$. Find the momentum and the force acting on it at time $t = 2 \, s$.

The motion of a particle of mass $m$ is described by $y = ut + \frac{1}{2}gt^2$. Find the force acting on the particle.