To calculate the work done, we need to consider the force applied by the girl minus the force of friction. The net force is 300N - 200N = 100N. Work done = force x distance. Therefore, the work done is 100N x 750m = 75,000 joules.
Objects which cause little amount of friction are smooth objects such as glass and other objects which are man-made (most of the time). However, there are many objects which are natural which can create minimal amounts of friction too.answ2. Very often, using two different materials will give superior wear characteristics - = low friction. e.g. White metal bearings against steel, Steel against wood (in ship's prop shafts).I'd expect glass against glass to have a high friction coefficient.
Friction is a force that always works against motion. Just imagine pushing a boxacross the floor. Does it slow down? Yes. This is because Friction is working againstthe forward motion of the box.===========================Let's think about this, and maybe we can figure it out . . .Let's assume that friction works in the direction of motion. If that's true, then we'rein great shape! All we have to do is give something a little tiny nudge, just enoughto start it moving, and then friction would keep it moving. Or, if there wasn't enoughfriction to keep it moving, then we could always make more friction . . . just set thelittle object on a big board with sandpaper on the bottom, and then there'd be plentyof friction, surely enough to keep it moving once we got it started.That's not the way things work. So the friction must be acting in the other direction,against the motion.This analysis brought to you by: Reductio Ad Absurdum, and his orchestra.
Surfaces with very little friction include ice, polished metal surfaces, and Teflon-coated surfaces. These surfaces reduce friction because they have smooth textures or surface coatings that allow objects to slide over them with minimal resistance.
Rubbing a balloon against your hair. Sliding a book across a table. Skating on ice. Walking on a rough surface. Options 1, 2, and 4 are examples of friction as they involve surfaces rubbing against each other, creating resistance. Skating on ice, however, involves very little friction due to the minimal contact between the skate blade and the ice surface.
In the context of friction, "little" would typically mean that there is not much resistance or opposition between two surfaces in contact. This would result in smoother movement and less energy loss due to friction.
Yes it is work. Your brother may already be moving, but pushing him will make him go faster.
Because your tires have little friction against ice and snow!
Ice has little friction. Sandpaper has lots of friction.
There is minimal friction on the moon because it has little to no atmosphere to create air resistance. However, there is still some friction on the moon's surface between rocks and particles when they move against each other.
I hate to punish my children, but sometimes I have to.
Objects which cause little amount of friction are smooth objects such as glass and other objects which are man-made (most of the time). However, there are many objects which are natural which can create minimal amounts of friction too.answ2. Very often, using two different materials will give superior wear characteristics - = low friction. e.g. White metal bearings against steel, Steel against wood (in ship's prop shafts).I'd expect glass against glass to have a high friction coefficient.
heat is really half of friction
it depends on what the car is doing, everything is effected my gravity which is pushing down and the surface its touching(wheels to the pavement) is causing friction, then when its rolling you also have rolling mass and contact patch of the wheels and weight.. you need to be a little more specific
In the bearings, where you want as little friction as possible.
The little brother is Doodle.
'little brother' = hermanito
Ice and marble floor have little friction and results in objects slidding as they go across the surface.