Under what conditions can you use the formula W=Fnetd to calculate the work done on an object? Describe 2 requirements. What conditions would an applied force increase and decrease the energy of any object.
In order to use the formula W = Fnetd to calculate the work done on an object, there are two requirements that must be fulfilled:
1. The Force must be the Net Force: The formula W = Fnetd applies when the force being considered is the net force acting on the object. The net force is the vector sum of all the individual forces acting on the object. It takes into account both the magnitude and direction of the forces.
2. The Displacement must be in the direction of the Force: The formula assumes that the displacement of the object and the force acting on it are in the same direction. This means that the force and the displacement vectors are parallel or anti-parallel to each other.
Now, let's discuss how an applied force can increase or decrease the energy of an object:
1. Increase in Energy: If an applied force is acting on an object in the same direction as its motion, it can increase the kinetic energy of the object. This is because the work done by the force is positive, resulting in an increase in the object's energy.
2. Decrease in Energy: Conversely, if an applied force is acting on an object in the opposite direction to its motion, it can decrease the kinetic energy of the object. In this case, the work done by the force is negative, resulting in a decrease in the object's energy.
It is important to note that the total work done on an object is the sum of the work done by all the individual forces acting on it. So if there are multiple forces present, you need to calculate the work done by each force separately and then sum them up to find the total work done on the object.