Which expression can be used to calculate centripetal acceleration? StartFraction 2 pi r over T EndFraction
StartFraction 4 pi squared r over r squared EndFraction
StartFraction 4 pi squared r over T EndFraction
StartFraction left parenthesis 2 pi r right parenthesis squared over r squared EndFraction

B

Explanation:

took test on edg and got it right

a) electrical > light, sound, and thermal< < < <

) the mechanical energy of the firefighter moving.< < < < a) electrical > light, sound, and thermal< < < <

c) both a and b.

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )