two other bigger children are going to push on the merry-go-round rim to bring it from rest to 45.0 rev/min in 39.0 s, with what force magnitude must each child push

12. A car magazine reports that a 1100 kg car has skid pad results of 0.80 g. This is an indication of the maximum centripetal acceleration possible before the car slides. (a) What is the maximum speed at which this car can go around a level curve with radius 30.0 m? (b) What is the minimum radius of curvature the car can go around at a highway speed of 30.0 m/s? (c) What magnitude of friction is on the car in either of these turns? (d) What coefficient of friction is necessary to achieve these turns?

What is the maximum speed with which a 1500-kg car can make a turn of radius 20 m on in level (unbanked) road with oith sliding (uk=1.0)

A wind turbine is rotating counterclockwise at 0.78 rev/s and slows to a stop in 21 s. Its blades are 27 m in length. (a) What is the angular acceleration of the turbine (in rad/s2)? (Indicate the direction with the sign of your answer.) |-0.233 v rad/s2 (b) What is the centripetal acceleration (in m/s) of the tip of the blades at t = 0? (Enter the magnitude. Round your answer to at least two decimal places.) X m/s2 648.27 (c) What is the magnitude (in m/s) of the total linear acceleration of the tip of the blades at t = 0? (Round your answer to at least two decimal places.) 648.30 x m/s? What is the angle that this total linear acceleration vector makes with the centripetal acceleration vector? (Enter the magnitude of the smallest such angle in degrees.) 0.56