07. what is the velocity of a 500kg elevator that has 4000J of energy?

1) Givens & Unknown:

2) Formula:

3) Sub & Solve:

v = 4 m/s

Explanation:

Given dа ta:

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