True or false: when work is done on an object, the object gains energy?

Yes since work is only done in the y component that means that there was a shift from one heigth to another so that means there was a change in potential energy.


a change in potential energy equals the work exerted on an object.True or false: when work is done on an object, the object gains energy?
What if the work I'm doing is removing the battery?True or false: when work is done on an object, the object gains energy?
Generally it's false. The energy -state- of the object will change, but it may lose energy. If a car is 'pushed' to a higher speed, the force accelerating it does work on the car and the car gains kinetic energy. But if the brakes are applied, a force in the direction opposite the cars motion makes the car go slower. Work has been done (a force has been applied through a distance), but the kinetic energy of the car has been reduced.





Doug
This is true if there are no other forces on the object.





Pushing a crate across the floor does not add energy to the crate because it all goes to friction.

hair straightening