Physics Lesson 40 Quiz

What is the definition of momentum in physics?

• The rate of change of velocity

• The product of mass and velocity

• The force applied over a distance

• The energy stored in an object

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

• Two billiard balls colliding and bouncing off each other

• A car crash where the cars crumple and stick together

• A rubber ball bouncing off the ground

• A pendulum swinging back and forth

What is the equation for the conservation of momentum in a closed system?

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

• It is completely conserved

• It is partially lost

• It is completely lost

• It is converted into potential energy

Which diagram best represents an inelastic collision?

• Two objects colliding and bouncing apart

• Two objects colliding and sticking together

• Two objects moving in parallel without colliding

• Two objects moving away from each other without interaction

How can simulations be used to study inelastic collisions?

• By visualizing the conservation of energy

• By demonstrating the conservation of momentum

• By showing the increase in potential energy

• By illustrating the increase in mass

Which of the following is a real-world application of inelastic collisions?

• Designing airbags in vehicles

• Calculating the orbit of planets

• Designing roller coasters

• Building bridges

Calculate the final velocity of two objects sticking together after an inelastic collision. Object 1 has a mass of 2 kg and velocity of 3 m/s, and Object 2 has a mass of 3 kg and velocity of 2 m/s.

• 2.4 m/s

• 2.6 m/s

• 2.0 m/s

• 3.0 m/s

Explain why momentum is conserved in an inelastic collision but kinetic energy is not.

• Momentum is a vector quantity, while kinetic energy is scalar

• Momentum depends on mass and velocity, while kinetic energy depends on velocity squared

• External forces do not affect momentum, but they do affect kinetic energy

• Momentum is always conserved in closed systems, while kinetic energy can be transformed into other forms

Describe how a simulation can help in understanding the concept of momentum conservation in inelastic collisions.

• By providing a theoretical framework for energy conservation

• By allowing manipulation of variables to observe different outcomes

• By offering a static representation of collision events

• By eliminating the need for mathematical calculations