An RC car drives around in a circle of radius 1.00 m. The coefficient of static friction between the tires and the floor is 0.85; the coefficient of kinetic friction is 0.60. The mass of the car is 400 g, and its speed is 2.5 m/s. What is the maximum speed at which the car could travel and still move in the same circle ?
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- Friction provides the force needed for a car to travel around a flat, circular race track. What is the maximum speed at which a car can safely travel if the radius of the track is 80 m and the coefficient of friction is 0.4?A student of mass M = 98 kg takes a ride in a frictionless loop-the-loop at an amusement park. The radius of the loop-the-loop is R = 24 m. The normal force by the track on the student at the top of the loop-the-loop is N₁ = 944 N. Find the speed of M at the top of the loop-the-loop. m/s Determine the normal force on M by the track at the bottom of the loop-the-loop, assuming the speed at the bottom is the same as at the top. NA pickup truck has a box sitting loose in its bed. The box has a mass of 2.5kg and the coefficient of static friction between the box and the pickup bed is 0.8. The mass of the truck is 3150 kg and its tires have a coefficient of static friction with the road of 0.9. the truck is currently going through a roundabout with a radius of 30m. How fast can the truck go and not have the box slide on the truck bed? Please answer in m/s.
- A 0.6 kg ball moves in a vertical circle on a 1m long string. If the speed at the top is 3.80 m/s, then the speed at the bottom will be 7.53 m/s. (a)What is the tension in the string when the ball is at the top? (b)What is the tension in the string when the ball is at the bottomA certain string just breaks when it is under 25 N of tension. A boy uses this string to whirl a 2 kg stone in a horizontal circle of radius 3 m. The boy continuously increases the speed of the stone. At approximately what speed will the string break?A 30 kg child slides down a slide with h = 4.0 m and arrives at the ground with a speed of 6.0 m/s. The slide forms the arc of a circle with a radius of 21 m with the ground tangent to the bottom of the slide. Determine the average friction force acting on the child. Hint: Use h = R(1 - cos(θ)) and s = Rθ where θ is in radians and s = arc length.
- A hockey puck that has a mass of 0.150 kg is tied to a light string and spun in a circle of radius 1.15 m on frictionless ice. If the string breaks under a tension that exceeds 4.00 N, what is the maximum speed vmax of the puck without breaking the Umax = m/s string?A small 0.250-kg object is attached to a string (see figure), where it swings in a section of a vertical circle of radius 2.50 m. Find the magnitude of the tension in the string when θ = 28.0°, the speed of the object is 4.50 m/sA racetrack has the shape of an inverted cone, as the drawing shows. On this surface the cars race in circles that are parallel to the ground. For a speed of 33.9 m/s, at what value of the distance d should a driver locate his car if he wishes to stay on a circular path without depending on friction? 40.0 T40.0 Number Units
- A small block with mass 0.0300 kg slides in a vertical circle of radius 0.550 m on the inside of a circular track. During one of the revolutions of the block, when the block is at the bottom of its path, point A, the magnitude of the normal force exerted on the block by the track has magnitude 3.75 N. In this same revolution, when the block reaches the top of its path, point B, the magnitude of the normal force exerted on the block has magnitude 0.685 N. Part A How much work was done on the block by friction during the motion of the block from point A to point B? Express your answer with the appropriate units. W friction = Submit μA Value Request Answer Units ?An object of mass 8.25 kg is travelling in a horizontal circle on a frictionless surface. It is attached to a rope that is 0.987 m long and has a tension of 16.9 N. Calculate the period of the uniform circular motion.At a circus, a stunt rider is going to do a "Loop-de-Loop". The radius of the circular part of the track is 8.13 m. The mass of the motorcycle and the rider is 318. kg. What is the minimum speed the motorcycle must have to just make it around the loop without falling?