A force of $10$ Newton acts on a body of mass $20kg$ for $10 \,seconds$. Change in its momentum is ........... $kg\,m/s$
$5$
$100$
$200$
$1000$
(b)$dp = F \times dt = 10 \times 10 = 100\;kg\;m/s$
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
An aircraft is moving with a velocity of $300\,m{s^{ – 1}}.$ If all the forces acting on it are balanced, then
A body of mass $2 \,kg$ is sliding with a constant velocity of $4 \,m / s$ on a frictionless horizontal table. The force required to keep the body moving with the same velocity is ……….$N$
A force of $100 \,dynes$ acts on a mass of $5\, gram$ for $10\, sec$. The velocity produced is ……… $cm/sec$
A body is imparted motion from rest to move in a straight line. If it is then obstructed by an opposite force, then
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