5. A ball of mass m = 0.275 kg swings in a vertical circular path on a string L= 0.850 m long as in the Figure. (a) What are the forces acting on the ball at any point on the path? (b) Draw force diagrams for the ball when it is at the bottom of the circle and when it is at the top. (c) If its speed is 5.20 m/s at the top of the circle, what is the tension in the string there? (d) If the string breaks when its tension exceeds 22.5 N, what is the maximum speed the ball can have at the bottom before that happens?

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ans. a) 18.8 m/s c) 10.8 m/s c) How fast can the car take a 40-m radius turn when the pavement is icy? b) How fast can the car take a 40-m radius turn when the pavement is wet? a) How fast can a 2000-kg car take a 40-m radius turn when the pavement is dry? is dry, us = .6 when the pavement is wet, and µs = .3 when the pavement is icy. The mass of the car is 5. The coefficient of static friction for a certain kind of pavement and tires is u, = .9 when the pavement

Part 1: 1. What is providing the centripetal force in Part 1? 2. How should the slope relate to the values of the mass of the rotating object, m and the radius of the circular path, r? I

4) À car travels around a curve banked at 10° to the horizontal. The radius of the curve is 90 m and the car is travelling at 61.2 km/h. Determine μs. 5) An Amazon package (2 kg) starts from rest, then begins to slide down a 4 m tall ramp that is inclined at 30°. The package then travels 12 m along a horizontal surface where it pushes into a spring (k = 3000 N/m). The package compresses the spring a distance x before coming momentarily to rest. Then the package is pushed in the opposite direction by the spring. The coefficient of friction between the ramp/floor and the package is 0.21. Calculate x and determine if the package will stop before it gets back to the ramp or if it will begin to slide up the ramp. h 6) A roller blader (84 kg) is travelling at 19 m/s [E]. A 21.2 kg child is riding a 7.8 kg bike at a speed of 6 m/s [W]. The roller blader and the cycling child collide in what can be assumed to be an elastic collision. What are the final velocities of the roller blader and the…

Bri is riding a roller coaster and encounters a loop. She is traveling 7.5 m/s at the top of the loop. The top of the loop has a radius of curvature of 3.9 m. Find the force that the loop exerted on Bri's 51 kg body at the top of the loop. Round your final answer to 1 decimal place.

A small ball is attached to one end of light rope that has a length of 4.0 m. The other end of the rope is attached to the ceiling. The ball is held with the rope horizontal and released from rest. The ball moves in the motion of an arc of the circle. When the ball is at its lowest point, with the rope vertical, the tesion of the rope is 15.5 N. What is the mass of the ball?

8. A bicyclist is riding on the banked curve of a circular velodrome. The radius of curvature for the bicyclist's present position is R = 355 m. The coefficient of static friction between the wheels and the path is µs= 0.35. For which range of velocities will the bicyclist remain at the same height on the banked curve? 8=25

A 200 g block on a 58.0 cm -long string swings in a circle on a horizontal, frictionless table at 95.0 rpm You may want to review (Pages 186 - 189) Part A What is the speed of the block? Express your answer with the appropriate units. 5.46 Submit Part B μA 10.27 Submit m X Incorrect, Try Again; 5 attempts remaining S Previous Answers Request Answer What is the tension in the string? Express your answer with the appropriate units. μÅ 3 ? N ? Previous Answers Request Answer X Incorrect; Try Again; 4 attempts remaining

A 59.0-kg ice skater is moving at 4.07 m/s when she grabs the loose end of a rope, the opposite end of which is tied to a pole. She then moves in a circle of radius 0.810 m around the pole. red (a) Determine the magnitude of the force exerted by the horizontal rope on her arms. kN (b) Compare this force with her weight. Frope %3D W Need Help? Read It