Question

A 250 kg object is lifted to a height of 4 m. What is the work done? How much

potential energy does the object have? What is the maximum kinetic energy on impact
if the object is released?

Answer 1

9800J

Step-by-step explanation:

It appears that potential energy is given to the object, so to calculate total energy in the system, we can use the potential energy formula

Potential energy = 250 kg • 9.8 m/s/s • 4 m

Potential energy = 9800J

You'll notice that the equation for the potential energy and work in this scenario is the same due to the fact that force would be equal to mass multiplied by gravity anyway.

Assuming the system has 100% efficiency, the total kinetic energy will be equivalent to the potential in the system currently