College

1) A person with a mass of 59.1 kg stands before a flight of 30 stairs, each 25.0 cm high.

He runs up 20 stairs, turns around, walks down 10 stairs, then changes his mind and goes up the remaining 20 stairs.

How much work did he do overcoming gravity?

(Remember to convert the height from centimeters to meters.)

Answer :

Answer:

P = 147,75 W

Explanation:

A man whose mass is 59.1kg climbs up 30 steps of a stair each step is 25 cm high

Height at 30 steps , h=30×2.5= 7.5 m

Change in potential energy , =mgh=59.1×10×7.5 = 4432.5 J

So, Work done by the man , W= 4432.5J

Power used , P= [tex]\frac{W}{T}[/tex]

P = 4432.5 /30

P = 147,75 W

Solve any question of Work, Energy and Power with:-

https://brainly.com/question/3854047

#SPJ1

Other Questions