0
Add your answer:
Earn +20 pts
When you say work is done against a force you mean the force does?
Negative work
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.
In the force has a component in the opposite direction from the motion the work done is negative?
Yes, when a force opposes the direction of an object's motion, the work done by that force is negative. This is because the force is doing work in the opposite direction of the displacement, resulting in a decrease in the object's energy.
When do you say that the work done is positive or negative?
Work done is considered positive when the force applied and the displacement of the object are in the same direction, causing movement in that direction. On the other hand, work done is considered negative when the force applied and the displacement are in opposite directions, resulting in work being done against the direction of the force.
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
What is the difference between negative work and zero work and positive work done?
If the angle between the displacement and force applied is less than a right angle, then it is Positive Work done. If the angle between the displacement and the force applied is greater than a right angle then it is Negative Work done. If the displacement and force are at right angles, or either is zero, then it is Zero Work done.
What is the sign of the work done by the frictional force?
The work done by the frictional force is negative because the force opposes the direction of motion. This means that the frictional force removes mechanical energy from the system by transforming it into heat, resulting in a decrease in the object's kinetic energy.
When a force is applied on a moving bodyits motion is retardedThen the work done is?
When a force is applied in the direction opposite to the motion of a moving body, the work done is negative. This is because the force is acting against the motion, causing a decrease in the body's kinetic energy. The negative work done represents energy being transferred out of the system.
What effect will the direction of the applied force to a book have on the amount of work being done?
The direction of the applied force affects the direction of the displacement of the book. If the force is applied in the same direction as the displacement, work is done. If the force is applied perpendicular to the displacement, no work is done. If the force is applied opposite to the displacement, negative work is done.
What force allows work to be done?
The force that allows work to be done is applied force. When an external force is applied to an object, it can overcome resistance and cause the object to move, resulting in work being done on the object. This force is typically in the direction of the displacement of the object.
When can work be negative physics?
Work can be negative in physics when the force applied to an object is in the opposite direction of the displacement of the object. This means that the force is doing work to move the object backward or against its direction of motion, resulting in negative work done. It is important to consider both the direction of the force and the direction of the displacement when calculating work.
Why is going downstairs negative work?
As you walk down the stairs, you apply a force to keep yourself from falling down the stairs. The force is in the upward direction, but your movement is in the downward direction. If the force is in the opposite direction of motion, work done by the force is negative. Gravitational force, because it pulls down, does positive work.
