icen

Just for ppl he need conformation the answers r right A- the formula is 1/2 mass x speed^2, so it would be 30*30^2 = 27000j so thats how A is correct. B- Is pretty simple, the train has more mass so it has more kinetic energy. C- If you ever biked in your...

who* not he lol

Ah, for ppl who got 9/10 check the last question.. u might've clicked potential energy instead of work-