Posted by **Bex** on Tuesday, February 3, 2009 at 8:01pm.

a bowling ball is thrown down from the top of a building at 20 m/s. Find the distance the ball travels in

A) 1 s

B) 3 s

should I make the 20 m/s negative? I'm assuming the ball is just being thrown stright down...

I'm using the formula d=V(initial)*t+1/2a*t^2

I'm getting -24.9 for a and -104.1 for b if I assume that 20 m/s is negative. I just really need someone to clear this up for me. please and thank you.

- Physics - urgent -
**Bex**, Tuesday, February 3, 2009 at 8:27pm
Please, please, I really need gelp for this.

- Physics -
**bobpursley**, Tuesday, February 3, 2009 at 8:38pm
yes, make the intial velocity negative, and a is negative also.

d= vi*t+1/2 g t^2 in the first second.

d=-20*1 -4.9 *1=-24.9 meters, if + is upward.

- Physics -
**Bex**, Tuesday, February 3, 2009 at 9:05pm
oh, okay, hank you so much!

## Answer this Question

## Related Questions

- physics - A bowling ball with a mass of 4.5 kg travels at a velocity of 37 m/s ...
- Math: Word Problem - A ball is thrown upward from the top of a building which is...
- Physics - Ball A is thrown straight down off the top of a tall building with an ...
- physics - A spherical bowling ball with mass m = 4.1 kg and radius R = 0.116 m ...
- Physics - A ball is thrown at an angle of 37.1degrees above the horizontal from ...
- Physics (mechanics) - There are two parts for this questions... "When a bowling ...
- Physics - A spherical bowling ball with mass m = 3.2 kg and radius R = 0.107 m ...
- Physics - A ball is thrown horizontally from the top of a building 17.6 m high. ...
- Physics - A ball is thrown horizontally from the top of a building 55.4 m high. ...
- Physics - A ball is thrown upward from the top of a 24.6 m tall building. The ...

More Related Questions