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If a deep river is faster why doesnt the larger wetted perimeter increase friction and slow down the speed of the river?
The speed of a river is affected by the amount of friction slowing down the water and the grade or fall of the river.
The amount of friction is determined by how rough the bed or wetted perimeter is, and how big the perimeter is.
A wide shallow river or a very deep and narrow river with the same volume and grade will be in contact with similar areas of river bed, causing the same amount of friction. But a river with a semi circular shape in cross section and the same volume and grade will have less contact area with the river bed and will therefore have less friction and be faster.
The steeper the grade of the river, the faster it will flow.
What else can I help you with?
When an object is moving faster through a fluid -how does this affect the force of friction?
When an object moves faster through a fluid, it experiences an increase in the force of friction due to the higher velocity leading to greater resistance from the fluid. This is because the faster movement creates more turbulence and pressure on the object's surface, resulting in an increase in friction.
Does moving faster increase friction?
No, increasing speed does not directly increase friction. Friction is primarily influenced by the nature of the surfaces in contact and the force pressing them together. However, increasing speed can sometimes generate more heat due to friction, which could in turn affect the friction between surfaces.
When energy is converted to molecules and they move faster does temperature increase or decrease?
As molecules move faster, they cause friction, which increases the temperature of the molecules.
Is the perimeter of a polygon less than the area of the polygon?
if your perimeter totals the same as 4 times pi then the maximum area that can be encompassed is equal to the perimeter. This is done by forming a circle. if you change the shape of the circle then the area will become smaller than the perimeter(circumference) if you make the circumference of the circle smaller then you will definitely decrease the area faster than you would the perimeter if you make the perimeter bigger then you will definitely increase the area faster than you would the perimeter.
When you rub your hands together they become warm what is this due to?
This is due to friction generated by the rubbing motion. Friction causes the molecules in your hands to move faster, which results in an increase in temperature, making your hands feel warm.
How can we make ourself run faster with friction?
To run faster with friction, wear appropriate athletic shoes with good grip on the soles to increase traction. Additionally, maintaining a proper running form and technique can help improve efficiency and speed by minimizing energy loss due to friction. Finally, consider running on surfaces with less friction, such as rubberized tracks or turf, to help reduce resistance and increase speed.
Why do objects heat up if they are moving faster?
Objects heat up when they are moving faster due to an increase in kinetic energy. As an object moves faster, its molecules vibrate and collide more frequently, leading to an increase in friction and heat generation. This is described by the kinetic theory of matter, which states that the temperature of an object is directly related to the average kinetic energy of its molecules.
Will forcing the water to move faster increase its temperature?
I would expect some increase in temperature to result from forcing water to move faster, since the faster moving water will have more friction with whatever channel or pipe it is moving in, and will have more turbulence which creates waste heat. But the increase in temperature could be very small.
True or False When friction occurs objects increase their speed and move faster?
False because it just cant be true for reasons
List and Explain 2 reasons why you might increase friction between two objects?
Car tires and the road: increasing friction will allow a car to brake faster. Shoes and the ground: increasing friction will make it less likely for you to slip.
Why does temperature increase when two surfaces are rubbing each other?
Friction causes the molecules to vibrate faster, meaning that they produce more heat.
If you want to go faster on a slide what do you do?
1. Increase the angle of inclination. (of the slide) 2. Reduce drag (in air) by for eg: lying down, wear a streamlined suit/ helmet. 3. Introduce a lubricant and/or materials to reduce the coefficient of friction. 4. increase your launch velocity.
