Two Different Hypotheses Are Developed to Explain Why Balls Bounce

By Ra_Adrienne417 11 May, 2022 Post a Comment

If an object is acted on by equal and opposite forces then it will be in equilibrium and its acceleration or velocity and so direction as well will not be changed. Lets define the geometric center of the ball as point C.

The ball begins at rest from height h with potential energy mgh where m is its mass and g is the acceleration due to gravity.

. Heavier ball and offer a model to explain the phenomenon. Eg a hollow rubber ball will bounce higher than solid rubber ball. In this explanation the bouncing ball physics will be broken down into seven distinct stages in which the ball motion before during and after impact is analyzed.

Ask your students which ball they think weighs more. Any balls that do not make it over that height are eliminated. When a tennis ball is thrown to the floor gravity pulls downward on the ball.

To begin your own investigation of the bounciness of balls youll need several different kinds of balls to compare. When a ball is dropped gravity pulls the ball toward the ground slowing the ball down so that each bounce is shorter and shorter until eventually the ball stops. Hold up a big ball and a small ball.

The two-ball bounce problem is often used to demonstrate that the rigorous rules of physics can produce counter-intuitive effects. This activity may pose difficulties with stopping the ball in the moment of its greatest bounce height and dealing with parallax. Eg the air inside a hollow ball acts like a spring and helps push the ball off the floor better than a solid.

A feather and a steel ball are simultaneously released from rest inside the tube. Get the students to develop a fair test to compare the height of bounce for each ball using the first measuring stickruler. In Box 3 they should write why they think that will happen their explanation or hypothesis.

Behind how balls bounce the following principles apply. Ball Bounce Height Comparison. Today she asked me as she was lying on her surf board in the bath LOL why the surf board sank in the bath but floated on the sea Id love you to share your wisdom on that one if you could I figured it was to do with displacement and that there was a lot more water in the sea.

Ask your students to describe the two balls. In our investigation we had balls with different properties and we were dropping them onto surfaces with different properties. Lets see if physics can explain what happens.

An alternative explanation was developed modelling. On first bounce it comes up to a height d corre-sponding to potential energy mgd. On the other hand a numerical recipe like two parts water to one part rice is.

But I wasnt really sure. Two different hypotheses are developed to explain why balls bounce. Hold a ball at a measured height above a solid surface-- one meter is a good height.

Experiments using basketballs show each hypothesis. The coefficient of restitution dh is the fraction of mechanical energy remaining. The marble will bounce the least high.

Id suggest a golf ball a tennis ball a baseball and a basketball for starters. Ask students to draw pictures of the balls that you just tested. The reason balls bounce is quite advanced science.

Keep raising the string and testing the bounce height of the balls until only one ball is left. Using a camera andor a banded ruler can help overcome these problems. The two forces acting on the soda pop can are.

When all three balls are dropped from the same height the rubber ball will bounce the highest because it has the greatest elasticity. This help to greatly increase the accuracy of the experiment. As Newton pointed out.

To simplify the discussion lets assume that the bounce surface is hard rigid and that air resistance is negligible. In Box 2 they should write what they think will happen expectationprediction. Develop an understanding of the concepts used to describe more abstract concepts.

This coefficient is always less than 1 unless you have flubber. Ask them to describe differences between the two balls one is bigger- one is smaller color texture etc. So when a ball bounces it exerts a force on the floor which matches the magnitude of the force in the opposite direction the ball is bouncing perfectly vertical up.

Useful for any amount of rice. For every action there is an equal and opposite reaction The ball bounces off the bat and into the air. On average the rubber bouncy ball will bounce the highest followed by the ping pong ball.

If the ball is made from an elastic material such as rubber it springs back to its initial shape. Give students paper and crayons. Drop a ball from 1 foot off of the floor slightly in front of a yardstick.

Why do balls bounce. When comparing how different balls bounce think about the conditions you should keep the same for example the height the ball is dropped from and force used to drop the ball. Two different hypotheses are developed to explain why balls bounce.

It relates to how much energy balls have what they are made of how they change shape and where the energy they have goes. Now drop the ball and notice how high it bounces. The two-ball bounce problem is often used to.

The first time you drop the ball do not take a measurement just watch where the ball goes so the next time the observer knows where to look. As the energy-driven ball hits the floor the. Ask them what the two balls have in common they are both round they are both balls etc.

That ball is the winner of the bounciest ball competition. Since the height to which the ball will bounce is directly proportional to its energy barring effects of air friction with a coefficient of restitution of less than one the ball will bounce less and less high. When a bouncing ball falls it initially gains speed or kinetic energythe energy of motion.

Experiments using basketballs show each hypothesis works equally well. While the ball is on the move kinetic energy--the energy of motion--is at work. As the ball pushes on the bat the bat pushes back on the ball.

In a laboratory on Earth all the air is pumped from a large tube. When the rubber ball hits the ground it gets compressed or squished and because it is very elastic it. When a tennis ball is placed on top of a basketball and the two.

How Is The Null Hypothesis Determined In Statistics Testing By The Outcome Involving An Equality Balls Bounce Or By The Outcome That Assumes No Correlation Or Influence Balls Don T Bounce Why Can T