A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 3 years ago
a stone thrown from ground level return to same level 4s after. with what speed was the stone thrown? take g=10ms2?
anonymous
 3 years ago
a stone thrown from ground level return to same level 4s after. with what speed was the stone thrown? take g=10ms2?

This Question is Open

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0please solve it for me

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Use s=ut+at^2/2 Put s=0 , a=10 , t=4

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0This is a simple kinematics problem. Separate the stone's flight into two sections. One going up, one going down. They both take the same amount of time, meaning two seconds up, two down. The velocity at the top of the stone's flight is zero! Then, use d = Vot + 1/2 a*t^2, starting from the second half of the stone's flight, from when it stops moving at the top to the bottom of its flight path. With the new distance, plug into Vf^2 = Vo^2 + 2ad. That should give you the starting velocity. (Vf is the "starting" velocity because we already assigned Vo to zero, the speed at the top of the flight path.)
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.