Homework Help: Physics

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 ball is thrown straight upward (along the y-axis) with an initial ...
Physics - A ball is thrown at an angle of 37.1degrees above the horizontal from ...
physics - A spherical bowling ball with mass m = 4.1 kg and radius R = 0.116 m ...
Physics (mechanics) - There are two parts for this questions... "When a ...
Math: Word Problem - A ball is thrown upward from the top of a building which is...
Physics - My problem question: "A ball is thrown up onto a roof, landing 4....
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 ...
Physics - A ball is thrown upward from the top of a 50.0 m tall building. The ...

For Further Reading

First Name:
School Subject:
Answer: