a person swings a rock around on a string, causing it to sweep out in a circle of radius 1.8m. If the rock travels at a constant speed of 18.7 m/s, what acceleration does it experience?

An object travels in a vertical circle of 1.43 m radius. When the object is traveling downward and is 28.0° from its lowest point, its total acceleration is a = (18.51 + 16.2ĵ) m/s². At this instant, determine the following. (Take the angle 28.0° clockwise from the axis of the circle that intersects the center and the lowest point. Assume that the +x axis is to the right and the +y axis is up along the page.) esc 7 (a) magnitude of the radial acceleration m/s² (b) magnitude of the tangential acceleration m/s² (c) speed of the object m/s (d) velocity of the object (Express your answer in vector form.) m/s v= 1 ² F1 Q A 1 N 2 Q F2 W S 3 X # H option command 80 F3 E D $ 4 C 990 GOD F4 R F % 67 8 5 F5 V T MacBook Air 6 G F6 Y B & 7 H 4 F7 U N 00 * 8 J FB 1 ( 9 M F9 K O O < A I -10 L || ! P V F11 1 + { [ 2 412 1 - option command

(a) Can a particle moving with instantaneous speed 8.00 m/s on a path with radius of curvature 2.00 m have an acceleration of magnitude 42.00 m/s?? Yes No If the answer is yes, explain how it can happen; if the answer is no, explain why not. This answer has not been graded yet. (b) Can it have an acceleration of magnitude 20.00 m/s²? Yes No If the answer is yes, explain how it can happen; if the answer is no, explain why not.

A car drives around a circular track of diameter 156 m at a constant speed of 33.0 m/s. During the time it takes the car to travel 102 degrees around, what is the magnitude of the car s average acceleration?      13.96 m/s^2     6.98 m/s^2     12.19 m/s^2     0 m/s^2 CANNOT USE CENTRIPITAL MOTION EQUATION, must calculate average acceleration