Momentum and Energy in Collisions

This video provides a comprehensive review of impulse and momentum, covering key formulas and concepts needed for exams. It explains how to calculate impulse and momentum, the impulse-momentum theorem, and the conservation of momentum in collisions. The video also discusses force calculation using mass flow rate and introduces the concept of elastic and inelastic collisions.

What is the formula for calculating momentum?

• Velocity divided by time

• Mass times velocity

• Force times time

• Mass divided by force

Which letter is sometimes used to represent impulse in textbooks?

• P

• J

• F

• M

According to the impulse-momentum theorem, impulse is equal to what?

• Change in velocity

• Change in momentum

• Change in mass

• Change in force

How can force be described in terms of momentum?

• As the rate of change of momentum

• As the rate of change of time

• As the rate of change of velocity

• As the rate of change of mass

What is the formula for calculating force using mass flow rate?

• Mass flow rate divided by velocity

• Mass flow rate times velocity

• Velocity divided by mass flow rate

• Mass flow rate plus velocity

In an inelastic collision, what is conserved?

• Kinetic energy

• Momentum

• Both kinetic energy and momentum

• Neither kinetic energy nor momentum

What happens to kinetic energy in an inelastic collision?

• It is lost

• It is conserved

• It is transferred

• It is doubled

In a perfectly elastic collision, what is conserved?

• Neither momentum nor kinetic energy

• Only kinetic energy

• Only momentum

• Both momentum and kinetic energy

Which equation is used to solve for unknowns in elastic collisions?

• Conservation of force

• Conservation of momentum

• Conservation of energy

• Conservation of mass

What additional equation is needed if both final speeds are unknown in an elastic collision?

• Conservation of energy

• Conservation of time

• Conservation of force

• Conservation of mass