Which force resists you from doing the work fast?
Friction can slow things down and sometimes make things go faster because of the grip that it causes. STATIC FRICTION is the force that will resist the movement up until it is overcome by a greater force and the motion occurs.
Why a person holding a suitcase does not do any work?
when a person is holding a suitcase , there is no displacement by him , means S= 0. therefore no work is done .
Can the object be moving and have its work be zero?
Explanation: When an object is moving with constant velocity, it means that there is 0 acceleration and hence no force and no work done. Generally an object, when it moves with constant velocity, is overcoming some friction and some force is being applied to balance it.
Is holding a book in your hands work?
To do mechanical work on something you must be exerting a force in the direction of your motion. When you are holding a book, the force you exert is upwards (to support its weight). But when you walk you are moving horizontally, so no work is done on the book.
Is work done if you carry a book across the room at a constant velocity?
If we carry a book across the room at a constant velocity, the work done is zero. This is because our weight is acting vertically downward and we are moving forward. The angle between the force and the displacement is 90. So, no work is done.
What are two examples of forces doing negative work?
Negative work follows when the force has a component opposite or against the displacement. Negative work removes or dissipates energy from the system. Two examples: In pulling a box of books along a rough floor at constant velocity, I do positive work on the box, that is I put energy into the system.
When the work done is said to be zero?
In physics, work done is actually always with the aspect of an external agent which is known to produce a force on some other entity. The work is stated as zero when there is no displacement of any given object along a line of force.