QUESTIONIs there a difference with the exit velocity of a baseball coming off of a BBCOR or BESR certified aluminum baseball bat?

BBCOR BESR

Introduction In 2011, the NCAA approved and implemented the use

of BBCOR baseball bats In 2010, the NCAA was under BESR baseball bats Why is it important and why the changes?

Reduce the exit speed of the baseball. Safety BBCOR bats perform more like a wood bat Speed up the game Prepare athletes better for the pros

It has arguably changed the scope of baseball and how the game is played. Teams are now having to rely on bunting more to score runs, rather than relying on homeruns.

It changes the way coaches coach and players react!

Operational Definitions Velocity: The rate of speed calculated in Miles

Per Hour. Coefficient of Restitution/Trampoline

Effect: The coefficient of restitution is a measure of the elasticity of the collision between ball and bat. Elasticity is a measure of how much bounce there is, or in other words, how much of the kinetic energy of the colliding objects before the collision remains as kinetic energy of the objects after the collision.

Ball Exit Speed Velocity- Maximum exit velocity of a ball coming off of a bat after the point of contact. A brand new bat must not exceed an exit speed of 97 miles per hour.

Theoretical Hypothesis Ha: The exit velocity of a baseball coming off

of a BESR certified bat will be higher than a ball exiting a BBCOR certified bat!

Ho: There will be no significant difference in the exit velocity off of a BESR or BBCOR certified bat!

Variables Independent

BESR Bats BBCOR Bats

Dependent Exit velocity of a baseball coming off a BESR

or BBCOR certified bat using a standard stationary hitting tee

Methods Participants

8 MSU-Billings University Baseball Players

College aged Freshman-Seniors

18-24 year old males

Randomly Assigned

Trained Collegiate Baseball Athletes

Apparatus/Materials Stalker Radar Gun- Used to see velocity/speed

of the baseball

5 Wilson A1001-Red Cushioned Cork Center: Premium Leather (Brand New Pearls)

ATEC Tee- Standardized and Stationary

Batting Cage/Net- Located in Lower Gym: MSU-Billings Campus

8 Participants

ProceduresParticipant- Parallel to the tee and perpendicular to the net.http://www.bing.com/videos/watch/video/baseball-hitting-instructional-videos-tee-drill/6d2a55979e1869998a216d2a55979e1869998a21-309014495480?q=baseball%20tee&FROM=LKVR5&GT1=LKVR5&FORM=LKVR34

Procedures Continued Participants randomly selected. 8 total

participants

Tee placed in front of net

Each participant hit 5 Pearls with each bat

KEY/Instruction: Hit the ball as hard as possible directly into the net and directly at the radar gun

The exit velocity of the baseball was recorded after each swing in miles per hour.

Design True Experimental Design-Groups were

randomly formed, and all subjects were equivalent at the beginning of the research.

Randomized Groups

R T O

T-Test for Correlated Samples- Vassar Stats http://faculty.vassar.edu/lowry/VassarStats.html

Results F Value= 2.15 P Value=0.166999 DF (Degree of Freedom) between groups=7

DF 7 at the .05 level is=.6664

16% Chance!

SIGNIFICANT DIFFERENCE

MUST REJECT NULL HYPOTHESIS

Threats to Validity History-Fatigue of Participants

Health of each bat- Dents and overuse

Health of Athletes- Rehab?

Expectations of Athlete/Researcher

Conclusions No Significant Difference

Accept Null Hypothesis

Simulated Data