Respuesta :

Explanation:

the answer is 4 meters and 400 j of work had to be done

Answer:

4 meters

Explanation:

The formula for gravitational potential energy is mgh, where m is the mass of the object in kilograms, g is the gravity, and h is the height in meters. You can use this to set up the following equation:

400=100 * h

h=4 meters

Hope this helps!