PDA

View Full Version : Physics


dee145
Mar 2, 2011, 06:38 PM
Adam is riding forward on an electric scooter at 10 m/s. He throws a ball to Robert, who is stationary. The ball travels at a speed of 8 m/s relative to Adam. How fast is the ball moving relative to Robert as he tries to catch it?

jcaron2
Mar 2, 2011, 06:52 PM
Where are you getting stuck? Do you at least have a guess as to what the answer is?

dee145
Mar 2, 2011, 06:53 PM
Nope

jcaron2
Mar 2, 2011, 07:06 PM
Adam is moving at 10 m/s, and the ball goes an additional 8 m/s faster than that. So how fast is it traveling in all?

dee145
Mar 2, 2011, 07:13 PM
I guess 18

jcaron2
Mar 2, 2011, 07:14 PM
You got it. That's all there is to it. :)

dee145
Mar 2, 2011, 07:17 PM
OK