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07. what is the velocity of a 500kg elevator that has 4000J of energy?
1) Givens & Unknown:
2) Formula:
3) Sub & Solve:

Respuesta :

Neetoo

Answer:

v = 4 m/s

Explanation:

Given data:

Mass of elevator = 500 kg

Energy = 4000 j

Velocity = ?

Solution:

1/2 mv²  =  4000 j

1/2 (500 kg)v²  =  4000 j

v²  =  4000 j×2 / 500 kg

v²  =  4000 kg. m²/s² ×2 /  500 kg

v²  = 8000 kg. m²/s² /  500 kg

j =  kg. m²/s²

v²  = 16 m²/s²

v = 4 m/s

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