Which balls bounce higher

Students should make as many observations about each ball as possible. How does it feel, can it be squeezed, can it be shaped. Students predict which balls will bounce the highest. Drop the balls from a specified height e. Measure each ball three times to ensure a good average value for each ball. Compare findings to predictions and observations. Hypothesise what properties objects should have in order to bounce. Explanation: When we drop a ball and it hits the floor, some of that kinetic energy changes or deforms the shape of the ball.

Vocabulary: Elasticity : The tendency of an object to return to its original shape after being stretched or compressed. Extensions Put some of the bouncy balls in the freezer for a few hours. Take them out and bounce them again. Do they go as high when they are cold? Did any of the balls bounce higher than 1 metre? Why does this make sense? Where there any unintended energy conversions? Because of that, the tennis ball has more energy than it started with and bounces higher.

If a tennis ball and a golf ball are bounced, then the tennis ball will bounce higher then the golf ball because the tennis ball has pressurized air inside of it making it need to use less energy to deform, and having more energy left for the rebound. 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.

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. For example, a ball that bounces back up to its original height. While Rowing a boat, when you want to move forward on a boat, you paddle by pushing the water backwards, causing you to move forward.

While Walking, You push the floor or the surface you are walking on with your toes, And the surface pushes your legs up, helping you to lift your legs up. This law represents a certain symmetry in nature: forces always occur in pairs, and one body cannot exert a force on another without experiencing a force itself.

The wall pushed back your hand hurts , but the force you applied broke the wall and pushed pieces forward.

When a body exerts a force on another body, both being in contact, the other body also exerts an equal and opposite force at their contact. The reason is that the time between bounces decreases as the bounce height decreases.

When the ball is elevated it has potential energy and gravity pulls on it and it falls using up kinetic energy and so it bounces lower and lower.

So when the energy goes to zero it will stop bouncing. We now know that this ball has a We can fill in a table or calculate the height of the ball after each further bounce…. Student Exploration. Question 2. The law of conservation of energy implies that a bouncing ball will bounce forever. When you drop it on the floor, it changes some of its energy into other forms, such as heat, each time it hits the floor.

Potential energy is stored energy. Potential energy is the energy that exists by virtue of the relative positions configurations of the objects within a physical system. This form of energy has the potential to change the state of other objects around it, for example, the configuration or motion.

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