Question

Help please

Answer 1

U = 1/2 kx^2 solve for k

Answer 2

5=1/2(k)(0.5)^2

Answer 3

good, solve for k

Answer 4

k has to be a positive number, it can't be 0

Answer 5

5=(1/2)(k)(0.5)^2
if k is 0 that would make the entire right side 0, right? and 5 =/= 0 so k must be something else

divide both sides by (1/2) then divide both sides by 0.5^2

Answer 6

Did it by hand this time, k=40?

Answer 7

good, k = 40

Answer 8

C?

Answer 9

good

Answer 10

C

Answer 11

awesome

Answer 12

D

Answer 13

I got something a little different

impulse = Ft, solve for F

Answer 14

yes b i meant to do that did 3000/10 instead

Answer 15

good so B

Answer 16

C

Answer 17

good

Answer 18

D

Answer 19

I got something a little different

impulse = delta p = final momentum - initial momentum = ?

Answer 20

B

Answer 21

change in velocity = 5 - 3 = 2 m/s

so change in momentum = ?

Answer 22

C

Answer 23

ugh

Answer 24

awesome, c

Answer 25

C

Answer 26

good, I got c too

Answer 27

B

Answer 28

B

Answer 29

\(\Huge \color{green}{\checkmark}\)

Answer 30

C?

Answer 31

I got C?

Answer 32

agree