What is rebound height?

Vertical ball rebound is a measure of how high a soccer ball will bounce after impacting the synthetic turf surface. … That distance is recorded as the ball rebound height. The test is conducted five times in each testing location and the average results are calculated.

How Does height affect Rebound height?

A ball hitting the ground with greater speed should bounce higher than a ball striking the ground with less speed; therefore, a ball dropped from a greater height will bounce higher than a ball dropped from a lesser height. When a ball is bouncing high into the air, it will continue to bounce for some time.

How do you measure rebound height?

Between the first and second bounces, the height can be expressed as h = 140 − 16(t − 6.49)2, 3.54 ≤ t < 9.45. The 6.49 is when the highest point is achieved (halfway between the two bounces), and the 9.45 seconds is derived from adding 3.54 seconds to the time between the first and second bounces.

What is rebound ratio?

In the concept for Geometric Sequences and Exponential Functions, you learned about representing a bouncing ball as a sequence and had to calculate the how high the ball bounces after a static number of bounces, or vice versa. In all of those examples, you were given the rebound ratio.

What is the relationship between drop height and rebound height?

The relationship between drop height and bounce height is only linear for small drop heights. Once a ball reaches a certain height, the bounce height will begin to level off because the ball will reach its terminal velocity.

What affects the bounce height of a ball?

The combination of the material properties of a ball (surface textures, actual materials, amount of air, hardness/ softness, and so on) affects the height of its bounce.

Why is it important to drop the ball from the same height three times?

When all three balls are dropped from the same height, the rubber ball will bounce the highest because it has the greatest elasticity. … This is because the higher the starting height of the ball, the higher the ball’s potential energy. An object has potential energy because of its position.

How does drop height affect bounce height?

If the drop height increases, then the resulting bounce height will also increase, because as the drop height increases, so does the gravitational potential energy which can be converted back into kinetic energy on the rebound.

Does drop height affect efficiency?

The higher the drop, the higher the rebound height, obviously. However, the higher the drop, the smaller the bounce efficiency also became. For example, a drop from 50cm had a 38 cm rebound whereas a drop from 200cm had a 102cm rebound. That is, the ratio becomes smaller with higher drops.

Does mass affect bounce height?

If the mass of the ball increases than the height the ball bounces will increase because the more mass an object has the more energy that gets build up when the ball gets released and makes the ball go higher.

How high will it bounce rebound ratios?

Tennis balls: Must rebound approximately 111cm when dropped from 200 cm. Soccer balls: Must rebound approximately 120cm when dropped form 200cm onto a steel plate. Basketballs: Must rebound approximately 53.5 inches when dropped from 72 inches onto a wooden floor.

How do you calculate rebound percentage?

It is calculated by dividing the total number of defensive rebounds generated by the player or team by the total number of rebounds available. Multiply the result by 100 to get a percentage.

Does height affect energy loss?

There’s a lot more air friction on the ball when it is dropped from a larger height, so it will lose more energy and won’t be able to bounce as high. … Therefore, if a ball is dropped from a larger height, its velocity will be much higher upon impact, which creates more friction and decreases the ball’s energy even more.

Why does a ball bounce higher when dropped higher?

Because the ball is softer than the floor, it does most of the denting and stores most of the energy. … When you drop a ball from a greater height, it has more kinetic energy just before it hits the floor and stores more energy during the bounce—it dents farther as it comes to a stop.

How does drop height affect the coefficient of restitution?

If the relationship between the drop height of the object and the coefficient of restitution is the square root of an inverse then as the drop height increases, Cr should decrease.

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