Example 11 : A boy whirls a stone tied to a thread, such that the stone moves uniformly in a circle. What must be the length of the thread if the stone completes 42 rounds in a minute with a uniform speed
of 2.2 m s-1?

Will give brainliest! jay rides his 2.0-kg skateboard. he is moving at speed 5.8 m/s when he pushes off the board and continues to move forward in the air at 5.4 m/s. the board now goes forward at 13 m/s.a. determine jay’s mass.b. determine the change in the internal energy of the system during this process.(express your answer to two significant figures and include the appropriate units.)

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?

Carbon 14 is a naturally occurring stable