Does the temp affect the bounce of a ball?
One factor that can influence the bounce of a ball is the temperature of the ball. A warmer ball will bounce higher than a cold one. The reason for this is twofold. In a hollow ball, the change in temperature causes a change in air pressure within the ball.
How does temperature affect the bounce of a golf ball?
This is because the gas molecules inside the ball expand as temperature increases. As the gas molecules expand, their energy increases and they bounce around faster inside the ball. That’s why higher pressure leads to a higher bounce of the ball. Likewise, a lower temperature will lead to a lower pressure.
How does temperature affect the restitution of a bouncing ball?
The temperature of the ball influences its coefficient of restitution. A warmer ball will bounce higher than a cold one.
What is the relationship between temperature and coefficient of restitution?
There is an inverse exponential relationship between the temperature and the coefficient of restitution. The coefficient approaches a maximum value of 0.90. Even when the ball is at high temperatures, some of the mechanical energy of the ball will be lost during each bounce.
How Does height affect energy efficiency?
The efficiency of a ball can be calculated by dropping and measuring the height of the bounce. The higher the bounce, the more efficient the ball is. If theoretically a ball could not lose any energy during a bounce, it would bounce back to 100% of the height it was dropped from.
How does temperature affect a football?
While the New England Patriots had “deflate-gate,” footballs deflate all the time as temperatures cool. When temperatures drop 10 degrees, air pressure in the ball drops by one pound per square inch. That may not sound like much, but during quickly dropping evening temperatures, a football may lose 20% of its air.
Does cold weather affect football games?
Cold weather affects, first and foremost, the football itself. The air pressure of a football is reduced by 20% in cold weather. Many footballs are inflated indoors, then brought into the cold, so the pressure in those footballs may drop during the game.
Does the amount of air in a football affect how far you can throw it?
Having an under-inflated ball also allows quarterbacks to throw the ball farther, Tompkins explained. When developing the grip for Baden’s footballs, the company’s R&D team found that by adjusting the RPM of a spiral from 5,400 to 7,200, it made a difference of four feet in distance traveled.
Why does a football shrink in the cold?
When the football is taken outside, its kinetic energy decreases due to the lower temperature change. Since the kinetic energy decreases, the molecules then move slower causing them to get closer together and take up less space, which causes the volume to decrease and allows the football to shrink.
Is a deflated football easier to throw?
In the end, the reason for deflating a football owes more to physiology than physics. A slightly deflated ball is a bit softer, making it easier to grip the ball to throw it and reducing the bounce when it hits the hands of a receiver, making it easier to catch.
What is the air pressure on an NFL football?
12.5 to 13.5 pounds per square inch
How much does the air pressure in a football matter?
The NFL requires that all game footballs be inflated to a pressure between 12.5 and 13.5 pounds per square inch (psi), and that they weigh 14 to 15 ounces (397 to 425 grams), ESPN reported. The footballs in the playoff game were underinflated by 2 psi.