Posted by **Sasha** on Tuesday, January 5, 2010 at 12:42pm.

As a baseball is being caught, its speed goes from 27.5 m/s to 0.0 m/s in about 0.0050 s. The mass of the baseball is 0.150 kg.

(a) What is the baseball's acceleration?

5500 m/s^2

(b) What are the magnitude and direction of the force acting on it?

and is it in

opposite in direction to velocity of the ball OR

same direction as velocity of the ball

(c) What are the magnitude and direction of the force acting on the player who caught it?

same direction as velocity of the ball

OR

opposite in direction to the velocity of the ball

- Physics -
**bobpursley**, Tuesday, January 5, 2010 at 1:16pm
wording..."about 0.0050 seconds" What exactly does that mean? What does the 0 following the .005 mean? If you instructor actually said that, I am amazed at his/her lack of understanding precision and significant digits.

a) wouldn't the acceleration be negative?

b)magnitude of force= a/m and in the direction opposite to initial motion (the negative direction).

The force on the catcher is just opposite to b.

- Physics -
**Sasha**, Tuesday, January 5, 2010 at 3:10pm
Okay the answer I am getting for this is 36666.67 but it said this was wrong?

Maybe I am doing it wrong though

I did 5500/.150

and it did say that the acceleration was right as a positive number

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