A small dog is trained to jump straight up a distance of 1.2 m. How much kinetic energy does the 7.2-kg dog need to jump this high? (The acceleration due to gravity is 9.8 m/s2.) Show your work.
3 answers
KE=PE=mgh=7.2x9.8x1.2=84.7 J
a girl lifts a 160-n load a height of 1 m in a time of 0.5 s. what power does the girl produce
A. 85 J
2 answers