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1) Centripetal force F acts on a car going around a 3) A go-cart travels around a flat, horizontal, circular track curve. If the speed of the car were twice as great, the with a radius of 25 meters. The mass of the go-cart with magnitude of the centripetal force necessary to keep the rider is 200 kilograms. The magnitude of the maxi- the car moving in the same path would be mum centripetal force exerted by the track on the go-cart 1. F is 1200 newtons. 2. 2FC 3. F/2 4) A 0.50-kilogram object moves in a horizontal cir- 4. 4FC cular path with a radius of 0.25 meter at a constant speed of 4.0 meters per second. What is the magni- tude of the object's acceleration? 2) The diagram below shows a 5.0-kilogram bucket of 1. 8.0 m/s' water being swung in a horizontal circle of 0.70-me- 2. 16 m/s' ter radius at a constant speed of 2.0 meters per 3. 32 m/s' second. 4. 64 m/s2 5.0-kg Bucket 5) A 1750-kilogram car travels at a constant speed of 15 meters per second around a horizontal circular track with a radius of 45 meters. The magnitude of the cen- tripetal force acting on the car is 0.70 m 1. 5N 2. 583 N 3. 8750 N 4. 3.94 x 105 N 6) On the diagram of the top view (below), draw the The magnitude of the centripetal force on the bucket path of the rubber stopper if the string breaks at the position shown. of water is approximately 1. 5.7 N 2. 14 N 3. 29 N 4. 200 N Rubber stopper Top view Level II A race car makes one lap around a track of radius 50 m in 9.0 s. 7) What is the average velocity? 8) What was the car's centripetal acceleration? Level III 9) An object is spun around in circular motion such that it completes 100 cycles in 25 s. a. What is the period of its rotation? [0.25 s] b. If the radius is 0.3 m what is the velocity? [7.54 m/s] C. Draw an arrow indicating the direction of the velocity on the image. 10) A body, B, is moving at constant speed in a horizontal circular path around point P. Which diagram shows the direction of the velocity (v) and the direction of the centripetal force (F) acting on the body? v . .p Fe. .P (1) (3) B . .P Fe .p (2) (4)