Question

Help in 17 . plz help

Answer 1

position function is already given so assume you had no trouble evaluating the position function at t=pi/2

Answer 2

but velocity=(position)'
speed=|velocity|

Answer 3

acceleration=(velocity)'

Answer 4

position = 4 ft
velocity =-5

Answer 5

speed = 5 ?

Answer 6

yes
velocity =-5 ft/sec
speed = 5 ft/sec

Answer 7

and your position=4 ft is correct

Answer 8

okay so then for acceleration is the the derrtaive of velocity equation ?

Answer 9

yes

Answer 10

acceration = -4

Answer 11

can the answers be negative ?

Answer 12

yea

Answer 13

oh okay .

Answer 14

can you help me with 16. please

Answer 15

yep let me take a look at 16

Answer 16

oh okay

Answer 17

so you know you have to find s' and s'?

Answer 18

s''*

Answer 19

sort of i have problems with that

Answer 20

so you know you have to find s' and s''?

Answer 21

this is what i did one sec

Answer 22

Do you know product rule ?

Answer 23

yes

Answer 24

so you know the derivative of t is 1
and the derivative of sqrt(1-t^2) is?

Answer 25

yes that would be