Question

pls answer this question

Answer 1

$f = ma \\ for \: m1 \\ f = m1a1 \\ m1 = \frac{f}{a1} = \frac{10}{20} = \frac{1}{2} kg \\ for \: m2 \\ m2 = \frac{f}{a2} = \frac{10}{3 0} = \frac{1}{3} kg \\ now \: if \: they \: are \: tied \: together \: \\ total \: mass \: = \frac{1}{2} + \frac{1}{3} = \frac{5}{6} kg \\ hence \: final \: acceleration = \frac{10}{ \frac{5}{6} } = \\ = 6 \times 2 = 12m \: per \: second \: square$