Lilly places a rock on the platform of a triple beam balance. She slides the first weight out to the 100g mark, the second weight
out to the 70g mark, and the third weight out to the 8.2g mark.
What is the mass of the rock?

question: ray weighs 100 kilograms, his wrestling partner, bobby, weighs 50 kilograms. if ray moves at 4 m s , how fast will bobby have to run at him to apply an equal amount of kinetic energy?

answer: 8 m/s he needs to run twice as fast to keep up so he has some work to do

explanation:   if the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

question answered by

(jacemorris04)