April, katy, and john study in the third grade. they regularly play a game they call "shopping,"
april assumes the role of a shopkeeper, katy assumes the role of april's assistant, and john acts as a
customer. they do not follow any rules they have a script, and they play according to it. it is
evident that april. katy, and john are engaged in what type of play

Ateacher attaches a ball to a meter long string and whirls it around in a horizontal circle at constant speed. the teacher explains that the string is what makes the ball go in a circle. why is the string necessary? a) the string is needed to apply a torque to the ball. b) the string is needed to push on the ball to get it up to speed. c) circle motion requires an inertia which is provided by the string. d) circle motion requires a force to give it a centripetal acceleratio