A2.0-kilogram cart is initially at rest on a level floor. determine the kinetic energy of the cart after a constant horizontal 8.0-newton force is applied to the cart over a distance of 1.5 meters.

12 J

Explanation:

For the work-energy theorem, the work done on the cart is equal to the kinetic energy gained by the cart:

where

W is the work done

Kf is the final kinetic energy

Ki is the initial kinetic energy

The work done is equal to the force times the displacement:

The initial kinetic energy of the cart is zero, since the cart is at rest:

So, we can re-arrange the equation above to calculate the final kinetic energy of the cart:

when insulating materials rub against each other, they may become electrically charged . electrons , which are negatively charged, may be 'rubbed off' one material and on to the other. the material that gains electrons becomes negatively charged. the material that loses electrons is left with a positive charge.