Question-152682

Question Number 152682 by alcohol last updated on 31/Aug/21

Answered by Olaf_Thorendsen last updated on 31/Aug/21

Time taken 1 second .

Potential energy E_{P} :

E_{P} = m g h = 50 \times 9, 81 \times 40 = 19620 J

Kinetic energy E_{K} :

E_{K} = \frac{1}{2} {m v}^{2} = \frac{1}{2} \times 50 \times 8^{2} = 1600 J

Now, the work done per second is :

P_{u} = \frac{19620 J + 1600 J}{1 s} = 21220 W