Momentum and Collisions Concepts

This video tutorial covers the concept of momentum for the AP Physics 1 exam. It explains momentum as a vector quantity, its conservation in closed systems, and the role of impulse in changing momentum. The tutorial also discusses different types of collisions, including elastic and inelastic, and provides practical tips for solving momentum problems. Key concepts such as the conservation of momentum, impulse, and collision types are explored in detail.

What is the unit of momentum?

• Joule

• Kilogram meter per second

• Watt

• Newton

In a closed system, what happens to the total momentum when no external forces act?

• It remains constant

• It increases

• It becomes zero

• It decreases

What is the significance of the center of mass in a system with no external forces?

• It accelerates

• Its motion does not change

• It remains stationary

• It changes its velocity

How is impulse related to momentum?

• Impulse is the product of force and time

• Impulse is the difference between force and time

• Impulse is the rate of change of momentum

• Impulse is the sum of initial and final momentum

What does the area under a force-time graph represent?

• Velocity

• Acceleration

• Impulse

• Kinetic energy

In an elastic collision, what is conserved?

• Only momentum

• Neither momentum nor kinetic energy

• Only kinetic energy

• Both momentum and kinetic energy

What happens to kinetic energy in a perfectly inelastic collision?

• It is partially lost

• It is completely lost

• It increases

• It is completely conserved

Which equation is used to calculate the loss of kinetic energy in a collision?

• Impulse = Force x Time

• Force = Mass x Acceleration

• Kinetic Energy = 1/2 mv^2

• Momentum = Mass x Velocity

What is a key step in solving momentum problems?

• Drawing diagrams and listing known values

• Using only scalar quantities

• Assuming energy is always conserved

• Ignoring velocity vectors

In which type of collision do objects stick together after impact?

• Perfectly elastic

• Perfectly inelastic

• Inelastic

• Elastic