A ball of mass $0.2\, kg$ moves with a velocity of $20 \,m/sec$ and it stops in $0.1 \,sec$; then the force on the ball is ........... $N$
A ball of mass $0.2\, kg$ moves with a velocity of $20 \,m/sec$ and it stops in $0.1 \,sec$; then the force on the ball is ........... $N$
$40$
$20$
$4$
$2$
A ball of mass $0.2\, kg$ moves with a velocity of $20 \,m/sec$ and it stops in $0.1 \,sec$; then the force on the ball is ........... $N$
$F = ma$ $ = \frac{{m\Delta v}}{{\Delta t}} = \frac{{0.2 \times 20}}{{0.1}} = 40\;N$