Imagine that you pushed a box, applying a force of 30 newton’s , over a distance of 5 meters. how much would you do have done ?

you would have done 150 joules

I'll assume you're talking about work.

The answer is 150 Joules

Explanation:

work is the equal to the product of the force applied on an object and its displacement

W = Fd

F = Force = 30 Newtons

D = displacement = 5 meters

W = 30 x 5 = 150 Joules

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.