An object with a mass $10\, kg$ moves at a constant velocity of $10 \,m/sec$. A constant force then acts for $4\, second$ on the object and gives it a speed of $2\, m/sec$ in opposite direction, the force acting on the object is ......... $N$
An object with a mass $10\, kg$ moves at a constant velocity of $10 \,m/sec$. A constant force then acts for $4\, second$ on the object and gives it a speed of $2\, m/sec$ in opposite direction, the force acting on the object is ......... $N$
$30$
$-30$
$3$
$-3$
An object with a mass $10\, kg$ moves at a constant velocity of $10 \,m/sec$. A constant force then acts for $4\, second$ on the object and gives it a speed of $2\, m/sec$ in opposite direction, the force acting on the object is ......... $N$
$F = ma = 10 \times ( - 3) = - 30\,N$
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