Work and Force
* Work is done when a force causes an object to move a certain distance. The formula for work is: Work (W) = Force (F) x Distance (d)
* Force is a push or pull that can change an object's motion.
Constant Velocity and Force
* When an object moves at a constant velocity, its speed and direction are not changing. This means there is no acceleration.
* According to Newton's First Law of Motion, an object at rest stays at rest, and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
* Since there's no acceleration, there's no net force acting on the object.
Applying it to Carrying an Object
1. You are applying a force to counter gravity to keep the object from falling. However, this force is balanced by gravity, so there's no net force.
2. The object is moving horizontally, but not because of you. It's moving because you are moving. You are not applying a horizontal force to the object.
Conclusion:
Because you are not applying a force that causes the object to move horizontally, you are not doing work. You are expending energy, but that energy is being used to maintain your own movement and to counter gravity.
