Which is an internal influence on physical activity?

a)family
b)cultural
c)backgroundlifestyle
d)media

once you write down your physical activity goal, what is the second step?

a)develop an action plan.
b)establish a support structure.
c)write a corresponding goal.
d)evaluate your ability to achieve it.

An athlete swings a ball, connected to the end of a chain, in a horizontal circle. the athlete is able to rotate the ball at the rate of 8.13 rev/s when the length of the chain is 0.600 m. when he increases the length to 0.900 m, he is able to rotate the ball only 6.04 rev/s. (a) which rate of rotation gives the greater speed for the ball? 6.04 rev/s 8.13 rev/s (b) what is the centripetal acceleration of the ball at 8.13 rev/s? m/s2 (c) what is the centripetal acceleration at 6.04 rev/s? m/s2