A ball of weight $0.1\, kg$ coming with speed $30\, m/s$ strikes with a bat and returns in opposite direction with speed $40 \,m/s$, then the impulse is (Taking final velocity as positive)
A ball of weight $0.1\, kg$ coming with speed $30\, m/s$ strikes with a bat and returns in opposite direction with speed $40 \,m/s$, then the impulse is (Taking final velocity as positive)
$ - 0.1 \times (40) - 0.1 \times (30)$
$0.1 \times (40) - 0.1 \times ( - 30)$
$0.1 \times (40) + 0.1 \times ( - 30)$
$0.1 \times (40) - 0.1 \times (20)$
A ball of weight $0.1\, kg$ coming with speed $30\, m/s$ strikes with a bat and returns in opposite direction with speed $40 \,m/s$, then the impulse is (Taking final velocity as positive)
Impulse = change in momentum
$m{v_2} - m{v_1}$= $0.1 \times 40 - 0.1 \times ( - 30)$