Question

help please only have little time left just tiny part of question!!!

Answer 1

The horizontal velocity is 10.5 cos(24.1).
The vertical velocity is 10.5sin(24.1)-0.36*9.81
(you have calculated both of these to answer part A, 9.61 m/s).
Then horiz.vel./vert.vel. is tangent(theta) where theta is angle required.

Answer 2

soo i got 65.9 does that sound correct?

Answer 3

oops its nots

Answer 4

Not exactly. The answer is way smaller. Remember there is a subtraction in the vertical velocity.

Answer 5

oops!

Answer 6

Correction should read:
\( \large \frac{vert. velocity}{hor.velocity} = tan(\theta) \)

Answer 7

so do i use arctangent after i divide ver vel/hor vel?

Answer 8

Yep!

Answer 9

so arctangent 12.62= 85.47

Answer 10

but thats not smaller than my other one hmm

Answer 11

What did you get for vert. vel. and hor. vel.?

Answer 12

You have probably inverted horiz. and vert.

Answer 13

horiz= 9.58?

Answer 14

9.58 is right.

Answer 15

vert= .7559

Answer 16

That is correct too!

Answer 17

Remember I made a mistake in my previous post, and later corrected?

Answer 18

i got 4.51?

Answer 19

That is correct! Good job!

Answer 20

its positive right not neg?

Answer 21

It's positive because both vert and horiz. vel. are positive.

Answer 22

man, it said it was wrong?

Answer 23

any ideas on why? i only have one chance left :/ PS-thanks for all your help your awesome

Answer 24

Sorry, I got the wrong question.
Time was 0.72 seconds.
So you can repeat the same calculations replacing 0.36 sec. by 0.72 sec, but the angle will be negative because the vertical velocity will be negative.

Answer 25

The reason it was wrong was 0.36 second apply to the first two questions.
The last two questions were for 0.72 second after the ball was kicked. I did not read the third question. Sorry.
I get -16.15 deg. (note: it's negative).

Answer 26

-16.12 sound correct?

Answer 27

oh hmm

Answer 28

We're pretty close! :)

Answer 29

do you have a few seconds to look at my last question/???

Answer 30

I'll check.

Answer 31

The "vector A" question?