A 3.00-kg objects has a velocity ( 6i - 1 k ) m/s . a) What is its kinetic energy at this moment ? b) what is thw work done on the object if its velocity changes to ( 8 i + 4 j ) m/s .
KE = 1/2 mv^2 v = sqrt ( 6^2 + (-1)^2) ) = sqrt37 m= 3.00
Work = change in KE
Initial KE 1/2 m ( 6^2 + (-1)^2)
final KE 1/2 m ( 8^2 + 4^2)
thank you
