Question

help

Answer 1

conservation of energy

Potential energy initial = kinetic energy final

mgh = (1/2)mv^2

solve for v

Answer 2

mass is 60 right

Answer 3

yes

Answer 4

and 100 is v?

Answer 5

v is the unknown

h is the height

Answer 6

so mg(100)=(1/2)(60)v^2

Answer 7

yes, keep going.

Answer 8

m is 60 so in mgh it would be (60)g(100) ?

Answer 9

yes, keep going

Answer 10

now do i just solve

Answer 11

yes, solve for v.

Answer 12

um just divide?

Answer 13

try to think about what is being done to v on the right hand side and then do the opposite

Answer 14

its being squared so i would find the sqrt?

Answer 15

v is:

being multiplied by (1/2)
being multiplied by m
being squared

so do the opposite of these things

Answer 16

save the square root for the last step

Answer 17

so i would divide by 1/2

Answer 18

yes

Answer 19

that would cancel out the 1/2 right

Answer 20

yes

Answer 21

and then divide 60?

Answer 22

yes

Answer 23

that leaves us with v^2 and i would square root that:

Answer 24

yes

Answer 25

now, what does v equal?

Answer 26

um 50?

Answer 27

you're a little off

what value are you using for g?

Answer 28

9.8

Answer 29

mgh = (1/2)mv^2

(60(9.8)(100) = (1/2)(60)v^2

try solving for v

Answer 30

44.3 maybe

Answer 31

good, 44.3 m/s = your answer