A 77 kg man climbs the stairs to the fifth floor of a building, a total height of 15.2 m. What is his potential energy in Joules when he reaches the fifth floor? Round your answer to 1 decimal place.
PE = mgh
11469.9
To calculate the potential energy of the man when he reaches the fifth floor, we can use the formula:
Potential Energy (PE) = mass (m) × gravitational acceleration (g) × height (h)
First, we need to find the gravitational acceleration. On Earth, the approximate value of the gravitational acceleration is 9.8 m/s².
Now, we can substitute the given values into the formula:
m = 77 kg
g = 9.8 m/s²
h = 15.2 m
PE = 77 kg × 9.8 m/s² × 15.2 m
PE = 11890.24 J
Therefore, the man's potential energy when he reaches the fifth floor is approximately 11890.2 Joules.