Question

A sled is at rest at the top of 2 m high slope. The sled has a mass of 45 kg. The sled's potential energy is

Answer 1

The equation for potential energy is PE = mgh, where m = mass of the object (sled), g = acceleration due to gravity (9.8 m/s^2), and h = height of the object.

Let's say that, at the bottom of the slope, the height if 0m. That means the height of the object, the sled, is h = 2m. We are also told that the mass of the sled is m = 45kg and that g = 9.8 m/s^2.

Plug these values into the equation for potential energy:
$PE = mgh\\ PE = (45)(9.8)(2)\\ PE = 882 J$

------

Answer: 822 J