Posted by **lora** on Monday, June 18, 2012 at 1:18pm.

if a ball is thrown straight up at a speed of 34.7m/s how long in seconds will it continue to rise before it starts to fall back down?

- physical science -
**Elena**, Monday, June 18, 2012 at 2:40pm
Upward motion:

v=vₒ-g•t

at the top point

0= vₒ-g•t1,

t1= vₒ/g =34.7/9.8=3.54 s.

h= vₒ•t1 –g•t1²/2=34.7•3.54 - 9.8•3.54²/2 =61.5 m

Downward motion

h=g•t2²/2,

t2=sqrt(2•h/g) =

=sqrt(2•61.5 /9.8) = 3.54 s.

Time (upward) =time (downward)!

t =2•t1=2•3.54 =7.08 s.

## Answer this Question

## Related Questions

physical science - If a ball is thrown straight up at a speed of 27.8 m/s, how ...

Physical science - If a ball is thrown straight up at a speed of 24.7 m/s, for ...

Physical Science - Four balls are taken to the top of a building. Ball 1 is ...

Physics - A red ball is thrown down with an initial speed of 1.3 m/s from a ...

physics - A red ball is thrown down with an initial speed of 1.2 m/s from a ...

Math, Science - A woman throws a 0.25 kg ball straight up in the air with a ...

Physics - Kevin stands at the edge of a cliff, holding one ball in each hand. He...

physics - A red ball is thrown down with an initial speed of 1.0 m/s from a ...

SCIENCE!! - a. When a ball is thrown straight up, by how much does the speed ...

SCIENCE!! - a. When a ball is thrown straight up, by how much does the speed ...