Posted by **Brenda** on Sunday, June 23, 2013 at 6:15pm.

In the absence of air resistance, a ballplayer tosses a ball

straight up.

(a) By how much does the speed of the ball decrease

each second while it is ascending?

(b) By how much does its speed increase each second

while it is descending?

(c) How does the time of ascent compare with the time

of descent?

- conceptual science -
**Henry **, Tuesday, June 25, 2013 at 5:32pm
a. V = Vo-g*t

V = Vo-9.8m/s^2*1s

V = Vo-9.8m/s. s.

The speed decreases by 9.8 m each second.

b. V = Vo + g*t

V = Vo + 9.8m/s^2*1s

V = Vo + 9.8m/s.

The speed increases by 9.8 m each second.

c. V = Vo + g*t = 0 @ max. ht.

Vo + g*t = 0

Vo - 9.8t = 0

9.8t = Vo

Tr = Vo/9.8 = Rise time=Time of ascent.

V = Vo + g*t

V = 0 + 9.8*t

Tf = V/9.8

V = Vo during ascent.

Therefore, Tf = Vo/9.8 = Tr.

## Answer This Question

## Related Questions

- Physics I - A ball has been thrown upward. Which of the following is true while ...
- 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 ...
- SCIENCE!! - a. When a ball is thrown straight up, by how much does the speed ...
- Physics - A small lead ball, attached to a 1.50-m rope, is being whirled in a ...
- Physics - A circus performer juggling while standing on a platform 15.0-m high ...
- Physics - I fire a tennis ball from an air cannon, straight up from ground level...
- Physics - I fire a tennis ball from an air cannon, straight up from ground level...
- Physics...help please! - I fire a tennis ball from an air cannon, straight up ...
- physics - You throw a ball straight up in the air. The instant after leaving ...

More Related Questions