From greatest to least, rank the net forces on the boxes. 3n 4kg 7n
7n 15kg 12n

5n 1kg 11n

3n 2kg 6n

What is the scientific definition of energy that relates to work

Does heating a metal wire increase or decrease its electrical resistance? why?

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