120 mph
The greatest acceleration a runner can achieve is 0.28 times the acceleration due to gravity (0.28g), where g is 9.81 m/s^2. This is because the frictional force is equivalent to 0.72 times the runner's weight, which opposes the force of the runner's push-off.
The greatest acceleration a runner can generate is limited by the static friction force, which is given by the product of the coefficient of static friction and the normal force. If the coefficient of static friction is 0.95, then the maximum acceleration would be 0.95 times the acceleration due to gravity (9.81 m/s^2), which equals 9.31 m/s^2.
friction: the force that resists relative motion between two bodies in contact.
On wet pavement, the presence of water reduces the friction between the tires and the road surface, making it more slippery. This is because the force needed to overcome static friction (needed to start moving) is less than the force needed to overcome sliding friction (needed to maintain motion). As a result, it is easier for a vehicle to slide or skid on wet pavement compared to dry pavement.
The force responsible for the painful difference between sliding on grass and sliding on pavement is primarily friction. Grass has more resistance and provides a softer landing surface, reducing the impact force compared to the harder and more abrasive surface of pavement. This difference in friction and surface roughness affects how energy is dissipated during a slide, leading to a less painful experience on grass compared to pavement.
The greatest acceleration a runner can achieve is 0.28 times the acceleration due to gravity (0.28g), where g is 9.81 m/s^2. This is because the frictional force is equivalent to 0.72 times the runner's weight, which opposes the force of the runner's push-off.
The greatest acceleration a runner can generate is limited by the static friction force, which is given by the product of the coefficient of static friction and the normal force. If the coefficient of static friction is 0.95, then the maximum acceleration would be 0.95 times the acceleration due to gravity (9.81 m/s^2), which equals 9.31 m/s^2.
Dry pavement creates more friction than ice pavement because when surfaces are dry, there is more contact between the tires and the road, leading to increased friction. On the other hand, ice has a low coefficient of friction, causing tires to slip more easily since there is less traction between the ice and the tires.
friction: the force that resists relative motion between two bodies in contact.
WHY!It is because the ice makes the friction between the tires and the pavementgreater.
On wet pavement, the presence of water reduces the friction between the tires and the road surface, making it more slippery. This is because the force needed to overcome static friction (needed to start moving) is less than the force needed to overcome sliding friction (needed to maintain motion). As a result, it is easier for a vehicle to slide or skid on wet pavement compared to dry pavement.
If there were no friction between your soles and the pavement, you would be unable to apply the force needed to walk forwards. Think how difficult it is to walk on ice where the friction is low.
The force responsible for the painful difference between sliding on grass and sliding on pavement is primarily friction. Grass has more resistance and provides a softer landing surface, reducing the impact force compared to the harder and more abrasive surface of pavement. This difference in friction and surface roughness affects how energy is dissipated during a slide, leading to a less painful experience on grass compared to pavement.
Friction affects the acceleration of a balloon racer by creating a force that opposes the motion of the racer. Higher friction between the racer's wheels and the surface will result in a lower acceleration, as more energy is needed to overcome this resistance. Reducing friction by using smoother wheels or lubricants can improve the acceleration of the balloon racer.
The friction force acting on an object is directly proportional to the object's acceleration. As acceleration increases, the friction force opposing the motion of the object also increases. This relationship is described by the equation F_friction = μ * N, where μ is the coefficient of friction and N is the normal force acting on the object.
Interesting - static friction is greater than moving friction; but if the car is not in a skid, then the part of the tires in contact with the road is not moving ... thus static friction holds in both cases.
This is the example of Newton third law and law of inertia.