0
A sled of mass 53.0 kg is pulled along flat snow-covered ground The static friction coefficient is 0.30 and the kinetic friction coefficient is 0.10 a What force will be needed to start the sled movin?
Wiki User
∙ 16y ago
Ignore the kinetic friction coefficient, that is only in the problem to trick you. If the force pulling the sled is parallel to the ground, then the problem should be pretty easy. Acceleration due to gravity = 9.8 m/s^2
Wiki User
∙ 16y ago
Add your answer:
Earn +20 pts
A sled of mass 50kg is pulled along snowcovered flat ground the static friction coefficient is 0.30 and the sliding friction coefficient is 0.10?
Just multiply the weight by each coefficient, add them together and multiply by 9.8
Give an example of friction?
Case 2: A truck is travelling at a constant speed up a hill with a normal force of 1360N. The Force of the Kinetic friction acting on the truck is 266N. What is the coefficient of kinetic friction between the truck and the road? N = 1360N, Fk = 266N Step 1: Substitute the values in the below Kinetic Friction Coefficient formula: This example will guide you to calculate the Kinetic Friction Coefficient manually.
What is the minimum rate of flow at which a stream of water can maintain the transportation of 1.0 centimeters in diameter?
You would have to know the weight or density of the pebbles, the coefficient of friction on the pebble's surface and the coefficient of friction on the ground.
When an egg hits the ground does it have friction?
the height of an object has more POTENTIAL ENERGY.Converted to kinetic energy
Does a car run because of the frition or reaction force from the ground is the friction static friction or kinetic friction?
No. the car runs by how much gas you have and how much power your car engine has.
How does friction effects peed on a skateboard?
I hope you mean speed, if not I'm at a loss for words. Friction effects both the contact between the wheels and the ground, as well as your shoe and the grip tape. You would like a high coefficient of static friction between the ground and your wheels so you don't end up skidding, fishtailing, and later flat-out falling down. Also, you would want a medium-level coefficient of kinetic friction and possible a medium-high coefficient of static friction between the grip tape and your shoe in order to grip the board, yet still be able to slide your foot for flip tricks. If the coefficient of static friction between the grip tape and your board is too high, it won't flip properly as it might overflip or flip on an unusual axis if it were to be too low. As you use the grip tape, both coefficients will decrease because the grains on the grip tape will be smaller and easier to pass over with a lesser repelling force of friction. Coming from a skateboarder in college-level physics.
What is the maximum acceleration a car can undergo if the coefficient of static friction between the tires and the ground is 0.78?
coefficient of friction = 0.8 tan theta use your calculator : 2nd tan ( 0.8) = 38.66 degrees
What is the maximum acceleration a car can undergo on level ground if the static coefficient of friction mew between the tires and the ground is 0.55?
if the static coefficient of friction mew between the tires and the ground is 0.55, then the maximum acceleration of the car will be 0.55g with assumption that there is enough engine power. 0.55g is about 5.4 m/s/s.
How many feet will you travel before the car comes to a stop if you're driving 65 mph?
It depends of the coefficient of friction between the wheels and the ground surface.
Why is friction necessary to drive a car on the road?
Without friction force, a vehicles tyres would not gain any traction on the road. There are two forms of friction force, static and kinetic. Kinetic friction force is necessary to keep a car gripped to the road while its in motion. The static force is what stops you from being able to push a car while the handbrakes on because the wheels aren't free to move and the force of friction is too great to allow the tyres to slide along the ground, as well as the fact a car weighs usually more than one metric ton. The force of friction is related to its (mu) factor or its friction coefficient carefully calculated by scientists under test conditions for several different types of surfaces under certain conditions.
How does friction act on a car?
According to wikipedia friction is defined as: "the force resisting the relative motion of two surfaces in contact or a surface in contact with a fluid (e.g. air)." Thus there are would be 2 locations friction would occur on a moving vehicle: (1) air resisting the motion of the vehicle; (2) friction between the tire and the ground. Two types of friction can occur between the tire and the ground, a) static friction, and b) kinetic friction. Static friction is when the tire maintains grip or traction on the road surface, whereas kinetic friction (as the name implies) is when the tire is moving relative to the ground. To illustrate static friction, consider for a moment a dot on the tire's surface. Your vehicle is moving forward (let's say it's moving very slowly), and your tire rotates so that the dot comes into contact with the ground at a certain point. Since a car tire compresses a bit on the road's surface, there's approximately 3-4 inches of tire flat against the road at any given time. As your car moves forward, the tire rotates, and once the dot touches the ground at a given point, the tire and the ground move at the same rate relative to the car. That is, the dot on the tire and the point on the ground remain in contact until the tire reaches the end of that 3-4" strip of contact, when it is pulled upward from the ground to rotate around top and back to the ground. An example of kinetic friction from the illustration above would be that the dot on the tire reaches a point on the ground, but the dot and point move away from one another. In real life this would be if you hit the brakes and skid, or if you hit the gas and burn out or spin your tires (e.g. in the snow or mud). The problem with kinetic friction is that it is weaker than static friction. Thus, when you hit the brakes, if your tires lock up (you'll hear the squealing tires against the road) you are now in kinetic friction and your car will slow down less (actually speed up) compared to when your tires were in static friction with the ground. That is why you pump your brakes... also why anti-lock braking systems (ABS) were developed.
If a car is coasting on a highway what is the coefficient of kinetic friction?
Even if the question were clear about what it's looking for, there's not enough information included with which to answer it. But it does raise an interesting point: When you think about this question, you come to appreciate what was so great about the invention of the wheel: Before wheels, any mechanical means of moving a load from one place to another had to involve something dragging on the ground ... so its success depended in turn on the coefficient of kinetic friction of the surfaces that had to be traversed. But once you have a wheel, the point of contact between the wheel and the ground is stationary ! How do you advance the load ? You apply a force in the forward direction at the height of the axle, which is a torque around the point of contact with the ground. The torque tends to tip the load forward, off of the point of contact ... but, conveniently, there's another point of contact on the rim of the wheel, waiting to take over. There's no more scraping or dragging ! The only friction loss is in the hub of the wheel, or the places where the load couples to the axle ... places where you can use all the grease and ball-bearings you want, and keep the whole thing with you wherever you go. The wheel has eliminated the concern you used to have for the kinetic friction of the road surface.
