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If an ice skater loses friction while skating in a wide circle, how will he move?
The skater while moving in a circle uses friction to constantly change his direction.
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- When you take your 1900-kg car out for a spin, you go arounda corner of radius 53 m with a speed of 13 m>s. The coefficient ofstatic friction between the car and the road is 0.88. Assuming yourcar doesn’t skid, what is the force exerted on it by static friction?A motorcycle rounds a banked turn of 7% with a radius of 85m. If the friction coefficient between the tires and the road surface is 1.2 and the mass of the motorcycle with rider is 260 kg, how fast can the motorcycle round the turn? Assume g=9.8m/s2.A coin kept on a horizontal rotating disc has its center at a distance of 0.1 m from the axis of rotation of the disc. If the coefficient of friction between the coin and the disc is 0.25, find the speed of the disc at which the coin would be about to slip off.
- A car enters a level, unbanked semi-circular hairpin turn of 100 m radius at a speed of 28 m/s. The coefficient of friction between the tires and the road is m = 0.800. If the car maintains a constant speed of 28 m/s, it willA child places a picnic basket on the outer rim of a merry-goroundthat has a radius of 4.6 m and revolves once every 30 s. (a) What is the speed of a point on that rim? (b) What is the lowest value of the coefficient of static friction between basket and merrygo-round that allows the basket to stay on the ride?A child places a picnic basket on the outer rim of a merrygo- round that has a radius of 4.6 m and revolves once every 30 s. (a) What is the speed of a point on that rim? (b)What is the lowest value of the coefficient of static friction between basket and merry-go-round that allows the basket to stay on the ride?
- An automobile moves on a level horizontal road in a circle of radius 50 m. The coefficient of static friction between tires and road is 0.50. (a) Calculate the maximum speed with which this car can round this curve. Now, suppose the road is covered with ice, there is no friction. Instead, the road is banked. (b) Calculate the angle the road must be banked at in order to make the car round the curve with the same maximum speed.A 1200 kg car is driving in a circle with a radius of 10 m. If the car has a tangential velocity of 30 m/s, find the coefficient of kinetic friction between the tires and the road.Why do roads on mountains have inward inclination at sharp turns?
- A 2000kg-car rounds a circular turn of radius 20m. If the road is flat and the coefficient of friction between tires and road is 0.7, how fast can the car go without skidding?An automobile moves on a level horizontal road in a circle of radius 30 m. (i.e. the road is flat, not banked) The coefficient of friction between tires and road is 0.50. The maximum speed with which this car can round this curve, and the direction of the frictional force is: (note: you may use g = 10 m/s/s) 10 m/s; radially inward 10 m/s; radially outward 12 m/s; radially inward 12 m/s; radially outward 14 m/s; radially inward 14 m/s; radially outward Not enough information is given.A car's maximum velocity speed of 4√10 m/s can turn safely on a cruved path that 40 meters radius and 0.4 coeffcient of static friction between tire and road. What must be the curved path radius if the maximum velocity speed of the car must be 10 m/s, with 0.5 as the coefficient of static friction so that the car can still turn safely without skidding out of a curved road?