Momentum and Impulse Concepts

The video tutorial explains the concept of momentum and its conservation during collisions. It highlights Newton's Third Law, showing how forces between colliding objects are equal and opposite, leading to momentum exchange. The tutorial uses graphical and numerical examples to illustrate these principles, emphasizing that total momentum remains constant unless external forces act on the system.

What happens to the green cube when the pink ball collides with it on a frictionless surface?

• It slows down.

• It speeds up to the right.

• It moves to the left.

• It remains at rest.

According to Newton's third law, what is true about the forces between the pink ball and the green cube during the collision?

• The forces are in the same direction.

• The forces are unequal.

• The forces are equal and opposite.

• The forces cancel each other out.

What is the term used to describe the product of force and time in physics?

• Energy

• Acceleration

• Velocity

• Impulse

How does the impulse experienced by the pink ball compare to that of the green cube during their collision?

• The impulse is greater for the pink ball.

• The impulses are unrelated.

• The impulses are equal and opposite.

• The impulse is greater for the green cube.

What remains constant in a closed system with no external forces during a collision?

• Total energy

• Total momentum

• Total velocity

• Total mass

Why is the conservation of momentum a useful tool in problem-solving?

• It simplifies calculations by ignoring forces.

• It allows for the prediction of velocity changes.

• It ensures energy is conserved.

• It provides a constant value to compare before and after a collision.

In the numerical example, what is the initial momentum of the pink ball?

• 8 kg m/s

• 5 kg m/s

• 10 kg m/s

• 2 kg m/s

How is the mass of the green cube determined in the numerical example?

• By measuring its velocity

• By using the conservation of energy

• By calculating the change in momentum

• By observing its acceleration

What effect does an external force, like gravity, have on the total momentum of a system?

• It has no effect on the total momentum.

• It decreases the total momentum.

• It keeps the total momentum constant.

• It increases the total momentum.

How can the change in total momentum due to an external force be calculated?

• By calculating the change in mass

• By observing the change in energy

• By using the force times time (impulse)

• By measuring the change in velocity