![The \: kinetic \: energy \: of \: an \: object \: of \: mass \: ‘m' \: moving \: with \: a \: velocity \: of \: 2.5 m/s \: is \: 25J. \: What \: will \: be \: it’s \: kinetic \: energy \: when \: its \: velocity \: is \: increased \: 3 \: times?\ \textless \ br /\ \textgreater \ \: please \: pleazzzzzzzzzz The \: kinetic \: energy \: of \: an \: object \: of \: mass \: ‘m' \: moving \: with \: a \: velocity \: of \: 2.5 m/s \: is \: 25J. \: What \: will \: be \: it’s \: kinetic \: energy \: when \: its \: velocity \: is \: increased \: 3 \: times?\ \textless \ br /\ \textgreater \ \: please \: pleazzzzzzzzzz](https://tex.z-dn.net/?f=The++%5C%3A+kinetic++%5C%3A+energy++%5C%3A+of++%5C%3A+an++%5C%3A+object++%5C%3A+of++%5C%3A+mass++%5C%3A+%E2%80%98m%27++%5C%3A+moving++%5C%3A+with++%5C%3A+a++%5C%3A+velocity++%5C%3A+of++%5C%3A+2.5+m%2Fs++%5C%3A+is++%5C%3A+25J.+%5C%3A++What++%5C%3A+will++%5C%3A+be++%5C%3A+it%E2%80%99s++%5C%3A+kinetic++%5C%3A+energy%EF%BB%BF++%5C%3A+when++%5C%3A+its++%5C%3A+velocity++%5C%3A+is++%5C%3A+increased++%5C%3A+3++%5C%3A++times%3F%5C++%5Ctextless+%5C+br+%2F%5C++%5Ctextgreater+%5C++%5C%3A+please++%5C%3A+pleazzzzzzzzzz)
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Formerly,
½mv² = 25 J
½ m (2.5 m/s)² = 25 J
½ m × 6.25 m²/s² = 25 kg m²/s²
½ m = 4 kg
m = 8 kg
But, now,
½mv'² = ½ (8 kg)(7.5 m/s)² = (4)(56.25) = 225 J.
[Finally, v' = 3v = 3(2.5 m/s) = 7.5 m/s.]
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