Question

????

Answer 1

conservation of energy

final kinetic energy = initial work = 2000J

then for b) solve for the velocity using the kinetic energy formula.

Answer 2

so ke=1/2(90)

Answer 3

don't forget the v^2

KE = (1/2)(90)v^2

Answer 4

oh oky so just 2000J for a

Answer 5

good, a is 2000J

Answer 6

and solve for v in b

Answer 7

yes

Answer 8

20/3

Answer 9

good, so 6.667 m/s = your answer for b