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What's the velocity of a ball falling with 100 joules of kinetic energy and a mass of 2 kilograms?

А. 3 m/s
B. 5 m/s
C. 7 m/s
D. 8 m/s
E. 10 m/s

User Anders Evensen
by
3.3k points

1 Answer

21 votes
21 votes

Answer:

E

Step-by-step explanation:

kinetic energy of linear motion


k.e = (1)/(2) m {v}^(2)

kinetic energy, K.e= 100joules

mass, m = 2kg

velocity, v =?

substituting the values into the formula :


100joules = (1)/(2) * 2kg * {v}^(2)


{v }^(2) = 100


v = √(100 )


v = 10m { \sec }^( - 1)

User SkyTreasure
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3.0k points