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Hold your open hand at shoulder-height, and have your associate carefully place a Bowling ball in your hand. Now allow the hand and bowling ball to descend slowly to the floor. Your hand has done 'negative work', equal to the (weight of the ball) times (distance it descended).
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When work is positive and when is negative?
when work is positive and when playing is negative
Why work done on the system is negativeand it is positive when its done by the system?
Oh, dude, it's like this: when work is done on the system, it's like the system is just chilling and getting stuff done to it, so it's negative because it's like, "Ugh, why are you messing with me?" But when the system does work, it's like, "Yeah, I got this," so it's positive because it's like, "I'm in control, baby!" So, yeah, that's why it's negative when done on the system and positive when done by the system.
Who an example of negative work?
An example of negative work can be seen when a person pushes a heavy object up a hill but the friction between the object and the surface prevents it from moving forward. In this scenario, while energy is being expended, the work done against the opposing force results in a net decrease in the object's potential energy. Negative work occurs when the direction of the force applied is opposite to the direction of the displacement.
Can work positive or Negative in physics how?
Yes Work can be positive or Negative.
How can you have both positive and negative work at the same time?
Very interesting approach! When Paul presses a spring then work done by Paul is positive and work performed by spring is negative. As per scalar product we have to use cos@ If @ is acute then cos @ is +ve and if @ is obtuse then it becomes -ve As force applied and displacement are in the same direction as in the case of Paul's attempt then work becomes positive But in case of spring's opposing force the displacement is in opposite direction and so work is negative
Can work done by a force be negative?
Yes. If force is negative, then work will be negative.
How do you determine a work done is positive sign or negative sign?
If work is done on the system then it has a negative sign. If work is done by the system then it has a positive sign.
Can total work done on an object negative?
Yes, the total work done on an object can be negative. This occurs when the force applied to the object is in the opposite direction to the displacement of the object. In this case, the work done is considered negative.
What can be said about a situation in which work done is negative?
the formula F.S cos angle is used (the dot product) so if angle is 0,cos angle=1 hence work done is positive and maximum if angle is 90 so cos 90 is 0 hence work done is minimum if work done is negative the angle is 180 The work done by friction is always negative (opposite the force) Since work is force x displacement, a negative value for work could mean that the displacent was negative
Is the work done by the system is considered as positive or on the system is considered as positive?
Work done by the system is considered as PositiveWork done on the system is considered as Negative
Can work done be negative in a physical system?
Yes, work done can be negative in a physical system when the force applied is in the opposite direction of the displacement.
Is the work done by friction always negative?
No, the work done by friction can be either positive or negative, depending on the direction of the force and the displacement of the object.
Is the work done on a system positive or negative?
The work done on a system is positive when energy is added to the system, and negative when energy is removed from the system.
When negative work is being done what happens to potential energy?
Negative work increases potential energy.
When do you say that the work done is positive or negative?
There are different conventions as to what work is negative and what work is positive. The convention used by engineers and physicists is that work done BY the system on its surroundings is positive while work done ON the system by its surroundings is negative. Chemists reverse these conventions.
What is the work done by the system according to the sign convention?
The work done by the system is positive if the system does work on its surroundings, and negative if work is done on the system by the surroundings.
Is the work done on a system negative in the given scenario?
In the given scenario, if the force applied to the system is opposite to the direction of the displacement, then the work done on the system is negative.
