Ask
your own question, for FREE!
Mathematics
19 Online
A signal flare is fired upward with initial speed 245 m/s. A stationary balloonist at a height of 1960 m sees the flare pass on the way up. How long after this will the flare pass the balloonist again on the way down?
Still Need Help?
Join the QuestionCove community and study together with friends!
s=ut+1/2 at^2 1960=245t-4.9t^2 Rearrange to get a quadratic for t: t=10 or 40
The first sighting is at 10 seconds so the second (when it comes back down) is 30 seconds thereafter.
Thanks!!
Can't find your answer?
Make a FREE account and ask your own questions, OR help others and earn volunteer hours!
Join our real-time social learning platform and learn together with your friends!
Join our real-time social learning platform and learn together with your friends!
Latest Questions
SnowyBreaks:
You ever get the types of dreams where it feels as if you aren't breathing? And w
laylasnii13:
Poem/diary i wrote I Want Out Iu2019m so tired of screaming into walls. Every fight with my mom leaves something broken and itu2019s not just plates or slam
Countless7Echos:
Aye.. I need actually some help on the shading here.. if the light is from above too I just feel something is off.
Countless7Echos:
I don't know just no sketch doodle day :p finished a video already so I'm pretty
7 hours ago
6 Replies
0 Medals
1 day ago
13 Replies
3 Medals
2 days ago
19 Replies
3 Medals
5 days ago
9 Replies
2 Medals