Question 1

PLS HELP ME Which object has the greatest kinetic energy?

A: a truck with a mass of 3,500 kg moving at 30 m/s

B: a person with a mass of 73 kg running 6 m/s

C: a locomotive engine with a mass of 205,000 kg moving 5 m/s

D: a fast pitched baseball with a mass of .5 kg moving at 46.9 m/s

Question 2

answer

A locomotive engine with a mad of 205000kg moving with 5m/s

Step-by-step explanation:

$from \: the \: options \: substitute \: the \: formulars \: for \: kinetic \: energy \\ for \: opton \: a \: ke = (1)/(2) mv {}^(2) = (1)/(2) * 3500 * 30 {}^(2) = 1575000 \\ for \: option \: b \: ke = (1)/(2) mv {}^(2) = (1)/(2) * 73 * 6 {}^(2) = 1314 \\ for \: option \: \: c = (1)/(2)mv {}^(2) = (1)/(2) * 205000 * 5 {}^(2) = 2562500 \\ for \: option \: d \: = (1)/(2)mv {}^(2) = (1)/(2) * 0.5 *(46.9) {}^(2) = 549.9025 \\ from \: the \: analysis \: above \: the \: options \: that \: has \: the \: highest \: kinetic \: energy \: is \: a \: locomotive \: engine \: with \: a \: mass \: of \: 205000kg \: moving \: with \: a \: velocity \: of \: 5 (m)/(s)$

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