No, work done by friction is always negative because it opposes the direction of motion. Friction always acts in the opposite direction to the force causing the object to move, resulting in a loss of energy and a decrease in the total mechanical energy of the system.
Friction opposes motion. As long as you define the direction in which the object is moving to be positive, the acceleration due to friction will be negative. If you think about it, you start out with positive speed and friction decreases the speed, so adding friction subtracted from the speed. Note: Friction is counterintuitive when you start dealing with rolling without slipping. This answer doesn't address this.
Friction can do positive work in a mechanical system by converting kinetic energy into heat energy, which can be useful in certain applications such as braking systems or clutches.
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.
It depends on how the axes are defined. If the for motion in one dimension, if the positive direction is defined direction of motion, then yes, because friction opposes motion. If the motion is in two or three directions, then the force of friction is a vector and, strictly speaking, neither positive not negative. The sign (if any) of any force is arbitrary, as long as all forces in the diagram use the same frame of reference.
The friction graph shows that as surface roughness increases, the force required to overcome friction also increases. This indicates that there is a positive relationship between surface roughness and the force needed to overcome friction.
Friction can be negative or positive depending on the direction in which your measures are positive.
zero
Without friction, cars wouldn't work.
Friction opposes motion. As long as you define the direction in which the object is moving to be positive, the acceleration due to friction will be negative. If you think about it, you start out with positive speed and friction decreases the speed, so adding friction subtracted from the speed. Note: Friction is counterintuitive when you start dealing with rolling without slipping. This answer doesn't address this.
Friction can do positive work in a mechanical system by converting kinetic energy into heat energy, which can be useful in certain applications such as braking systems or clutches.
it depends upon the systems displacement and your workdone
I got chills and there multiplying
When a force (no matter how large it may be) is applied to any object without a distance being moved,it cannot be workdone because,workdone = force x distance.
When a force (no matter how large it may be) is applied to any object without a distance being moved,it cannot be workdone because,workdone = force x distance.
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.
In a car Friction creates Energy losses that result is a loss of mechanical efficiency, and therefore lower gas mileage. On the positive side friction in the Braking System transform energy of motion into HEAT, allowing the car to stop.
it is defind as the amount of work done to bring a unit positive charge from infinity to that point in the electric feild it is devoted by V .: electric potential = workdone/charge V=w/q si unit is v