Hello, paulina,Originally Posted by paulina
The kinetic energy is . Plug in v into E and you'll get:
=
So it's answer b)
Greetings
EB
In Physics, is defined to be the Euclidean dot product (unless otherwise stated), thus there is no ambiguity.Originally Posted by CaptainBlack
Note that the scalar vs. vector argument can be used to throw out answers a), c), and c) .
-Dan