A ball of mass $0.15\, \mathrm{~kg}$ is dropped from a height $10\, \mathrm{~m}$, strikes the ground and rebounds to the same height. The magnitude of impulse imparted to the ball is $\left(\mathrm{g}=10 \,\mathrm{~m} / \mathrm{s}^{2}\right)$ nearly : (In $\mathrm{kg}\, \mathrm{m} / \mathrm{s}$)
$0$
$4.2$
$2.1$
$1.4$
A force of $50\, dynes $ is acted on a body of mass $5 \,g$ which is at rest for an interval of $3 \,seconds$, then impulse is
A machine gun fires a bullet of mass $40\, g$ with a velocity $1200\, ms^{-1}$. The man holding it, can exert maximum force of $144\, N$ on the gun. How many bullets can he fire per second at the most ?
When a horse pulls a wagon, the force that causes the horse to move forward is the force
Position-time graph for a particle of mass $100g$ is as shown in figure then impulse acting on the particle at $t = 5$ second is ............ $N-s$
$Ns$ is unit of which quantity ? Write dimensional formula of momentum.