Work is done when a force that is applied to an object moves that object. The work is calculated by
multiplying the force by the amount of movement of an object (W = F * d)
. A force of 10 newtons, that moves an object 3 meters, does 30 n-m of work.
In what situation where there is work done?
Work is done
whenever a force or a component of a force results in a displacement
. No component of the force is acting in the direction of motion when the book is moved horizontally with a constant velocity. The force and the displacement are independent.
How can we decide that work is done?
Work is said to be done when a force applied to an object moves that object. We can calculate work by
multiplying the force by the movement of the object
.
Which situation is work not done?
If
the force is perpendicular to the direction of displacement
, work done is zero. When the displacement opposite to the direction of force, work is negative.
How would you determine if there is no work done in a given situation?
If a force is applied but the object doesn’t move
, no work is done; if a force is applied and the object moves a distance d in a direction other than the direction of the force, less work is done than if the object moves a distance d in the direction of the applied force.
How can we find work done when force is variable?
- The work done by a constant force of magnitude F on a point that moves a displacement d in the direction of the force is the product: W = Fd.
- Integration approach can be used both to calculate work done by a variable force and work done by a constant force.
When we say the work is done?
Work is said to be done
when a force moves an object through a distance in its own direction
.
Is work done if displacement is zero?
If the displacement of the object is zero, then one can calculate the work done by each individual force, the
work done by each force is zero
. Why? Work is not defined in terms of what would have happened to the object in the absence of other forces; it is defined in terms of the motion that actually occurred.
What is transferred when work is done?
Work is the measure of energy transfer when a force (F) moves an object through a distance (d). So when work is done, energy has been transferred from one energy store to another, and so:
energy transferred = work done
.
What are the factors affecting work done?
- Work, Energy, and Power.
- Introduction To Heat, Internal Energy And Work.
- Work and Energy.
- Center Of Mass.
- Measurement of Mass.
- Mass and Momentum.
What is work done formula?
Mathematically, the concept of work done W equals the force f times the distance (d), that is W = f. d and if the force is exerted at an angle θ to the displacement, then work done is calculated as
W = f . d cos θ
.
Which is an example of a situation where no work is being done?
Answer Expert Verified
1.
When a table in on a floor at the same place for days together, there is no work done on the table by the gravitational force or normal reaction force
. 2. If I hold a book for some time, there is no work done on it by me.
What everyday activities do you know wherein work is done?
- moving table.
- pushing and pulling of door.
- walking.
- playing.
- lifting a rock if it moves from its place.
What are the different situations in which work is done and no work is done?
Here are some examples:
If someone is pushing on a wall with all their might, but the wall doesn’t move
, no work has occurred. This is because the distance is zero. If someone is using force to hold a rock over their head while walking eastward across a field, no work has occurred.
What are the examples of zero work done?
- If a block is moving on a smooth horizontal surface, no work is done.
- You are carrying two bags in your hands and not moving . …
- A person holds a bundle of hay over his head for 30 minutes and gets tired. …
- If you push a wall , but it does not move . …
- You sit on a chair for hours .
What are the examples of negative work?
Negative work is performed if the displacement is opposite to the direction of the Force applied. Example:
Work was done the gravity on a rocket going perpendicular upwards.
