Gravity
A pencil getting knocked off the desk is an unbalanced force. The force of the object hitting the pencil is greater than the force of gravity keeping it on the desk, causing it to fall.
The force required to lift a pencil off a desk is the gravitational force acting on the pencil. When you lift the pencil, you are exerting an upward force that overcomes the force of gravity pulling the pencil downward.
The force needed to move a pencil across a desk would depend on the friction between the pencil and the desk surface. If there is low friction, only a small force would be needed. If there is high friction, a greater force would be required to overcome it.
Gravity pulls the pencil downward towards the desk, creating a force that helps keep it balanced when not being moved by an external force. Other factors, such as the friction between the desk and the pencil, also play a role in keeping it stable.
The potential energy of the pencil is being converted to kinetic energy as it falls due to gravity.
A pencil getting knocked off the desk is an unbalanced force. The force of the object hitting the pencil is greater than the force of gravity keeping it on the desk, causing it to fall.
The force required to lift a pencil off a desk is the gravitational force acting on the pencil. When you lift the pencil, you are exerting an upward force that overcomes the force of gravity pulling the pencil downward.
The force needed to move a pencil across a desk would depend on the friction between the pencil and the desk surface. If there is low friction, only a small force would be needed. If there is high friction, a greater force would be required to overcome it.
Gravity pulls the pencil downward towards the desk, creating a force that helps keep it balanced when not being moved by an external force. Other factors, such as the friction between the desk and the pencil, also play a role in keeping it stable.
The potential energy of the pencil is being converted to kinetic energy as it falls due to gravity.
No, work is not being done when a pencil drops from a desk. In physics, work is defined as force applied over a distance in the direction of the force. Since the force of gravity causes the pencil to fall vertically without any horizontal displacement, there is no work being done in this scenario.
The force of your pencil or pen against the desk that your paper is on if you're writing something down. The force of your paper against the desk. The force of your book against the desk. In each case, the desk exerts the identical but opposite force against the object lying on it. If that were not true, the objects would deform the desk, or the desk would form a bump where the objects are lying on it.
The energy involved is primarily gravitational potential energy. As the pencil falls, this potential energy is converted into kinetic energy.
It's a question asking: Is there a pencil on the desk. Usually means in the desk, so it would be: Is there a pencil in the desk.
poo
I have a pencil in (meaning on) my desk. Tengo un lapiz en mi escritorio/pupitre/carpeta (alternatives for 'desk') I have a pencil in[side] my desk Tengo un lapiz dentro de mi escritorio.
It is called the mechanical pencil!