Question

Kinetic energy 25j mass velocity 5ms-1

Caculate kinetic energy when it velocity doubled and when it increases 3times

Answer 1

$25 = \frac{1}{2} \times m {v}^{2} \\ \\ \\ 50 = m \times 25m {s}^{ - 1} \\ \\ \\ m = 2kg$
$if \: mass \: doubled \: then \: 10m {s}^{ - 1} \\ \\ \\ kinetic \:energy = \frac{1}{2} \times 2 \times 100 \\ \\ = > 100 \: joules \\ \\ \\ similarly \: find \: out \: \: next \: one$