Respuesta :

hawanawabi18
Roberto has twice the mass his sister Mary has but runs at the same velocity as Mary. Will his kinetic energy be twice as much?

(Mary has a mass of 40 kg and sprints at 1 m/s)


Can someone help me with this (sorry I don’t have enough point for a question and no one has answered this and I’m confused)
rhishi2007

Answer:

The second, the third, and the last one

Step-by-step explanation:

The second is correct because we just multiply by 6 on both sides, thus not changing the value of the x

The third is correct because we just distribute the 6 into the parenthesis, and multiply the equal side by 6, thus just simplifying the expression, not changing it.

The last is correct because you just subtract 4 from both sides, and since done to both sides, doesn't change the equation.

Hope i helped you :)

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