a) KE=energy required to make them move=1800J
b) KE=1/2*mv^2, so 
J
No. Potentional (other wordy here) are a few of though.
Answer:
In physics, a polar vector is a vector such as the radius vector that reverses sign when the coordinate axes are reversed
Explanation:
Polar vectors are the type of vector usually simply known as "vectors." In contrast, pseudovectors (also called axial vectors) do not reverse sign when the coordinate axes are reversed.
A pie chart uses wedges to show the amount of data points in a category.
Lifting weights, did this yesterday :))
