Introduction to Elastic and Inelastic Collisions

The video tutorial covers the concepts of elastic and inelastic collisions, explaining the conservation of momentum and kinetic energy in each type. It highlights the differences between elastic and inelastic collisions, including perfectly inelastic collisions where objects stick together. The tutorial includes a demonstration of collisions to illustrate these concepts, emphasizing that real-world collisions are often inelastic. The video also features a brief segment on Charity Day, where participants discuss their chosen charities.

What is the main difference between elastic and inelastic collisions?

• Momentum is not conserved in inelastic collisions.

• Objects stick together in elastic collisions.

• Kinetic energy is conserved in elastic collisions.

• Momentum is not conserved in elastic collisions.

Which of the following is an example of an elastic collision?

• Two cars crashing and sticking together.

• A ball bouncing back to its original height.

• A football tackle where players hold onto each other.

• A ball dropping and not bouncing back.

In an inelastic collision, what happens to the kinetic energy?

• It is completely conserved.

• It is converted into potential energy.

• It is converted into thermal energy.

• It is doubled.

What is a perfectly inelastic collision?

• A collision where objects stick together.

• A collision where objects bounce off each other.

• A collision where momentum is not conserved.

• A collision where kinetic energy is conserved.

During the demonstration, why is the collision of the ball on the right considered inelastic?

• The ball sticks to the table.

• Kinetic energy is not conserved as it doesn't reach the original height.

• The ball bounces higher than its original height.

• Momentum is not conserved.

Why are real-world bounce collisions considered inelastic?

• Because they involve deformation and energy conversion to heat.

• Because they are always perfectly elastic.

• Because they always conserve kinetic energy.

• Because they never conserve momentum.

What is the ideal case for collisions on an atomic level?

• No collisions.

• Elastic collisions.

• Perfectly inelastic collisions.

• Inelastic collisions.