8 changes to this answer. Question 1 2.5 poin A particle moves in a cirele path of radius r and speed v. It then increases its speed to 3 v while traveling aloug same circular The centripetal acceleration ar of the particle has changed by a factor: a. 4 Ob. 5 OC.6 O d. 9 O e. 12 A Moving to the next question prevents changes to this answer.

Calculate the free-fall acceleration of an object at a height of 3190 km away from the earth surface? O A. 9.81 m/s^2 B. 4.90 m/s^2 O C. 39.24 m/s^2 D. 4.35 m/s^2

Help with 10. Thank you.

Q 3 please

A runner runs around a circular track. He completes one lap at a time if t=497s at a constant speed of v=3.9m/s. What is the radius r in meters of the track?what was the runners centripetal acceleration ac in m/s^2 during the run?

4. A particle travels along the circular path from A to B in Is. If it takes 3s for it to go from A to C, determine its average velocity when it goes from B to C. 30 30 m

Hi, below is the explanation to the problem cited.  But I don't understand the answer to the last question #3: Determine its average acceleration during the 34.0 sec interval.  I am lost; can you help? Thanks! A car initially traveling eastward turns north by traveling in a circular path at uniform speed as in the figure below. The length of the arc ABCis 214 m, and the car completes the turn in 34.0 s. An x y coordinate system is shown. Three points A, B, and C are shown on the graph. These points are joined by a dotted curve. Point A is on the negative y-axis, point C is on the positive x-axis, while point B is in the fourth quadrant IV at an angle of −35° with the x-axis. From point A the curve initially moves rightward along a circular path, curves upward to cross B and then meets C. An arrow indicating the velocity at point A points horizontally and to the right. An arrow indicating the velocity at point C points vertically upward. 1. What is the acceleration when the car is at…

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Q 2 please