Question

an 80 kg man runs up a flight of stairs 5.0m high in 10 seconds. What is the man's power output in watts?​

Answer 1

Answer:

Explanation:

Here is how I solved this problem.

First we know that P = Work/time.

Work = force x distance

We must calculate the force used by the man to climb the stairs.

Force = mass x acceleration.  In this case, the acceleration is that of gravity, 9.8 m/s2.

So f = 80 kg x 9.8 m/s2 = 784 N

The work the man performs is W = 784N x 3.8m = 2979.2 J

Power is work divided by time, so P = 2979.2 J/ 3.8s = 744.8 Watts.

Hope this helps.

PLS MARK AS THE BRAINLEST

REGARDS

SExy

Answer 2

Answer:

Explanation:80gx5.0

10

400/10

40