Momentum and Impulse

• Momentum: The quantity of motion of a moving object can be measured as a product of its mass and velocity.
• p = mv
• Impulse - Quantifies the overall effect of a force acting over time.
• Impulse has been given the symbol J and is expressed in Newton seconds.
• Impulse = j=f*deltat
• If a bus is going through a curvy road, its velocity will decrease.
• If a group of people enters a bus, the bus' mass will increase.
• Force - Needed to change a momentum of a body.
• Bodies change their momentum through collisions.
• f = mv/t
• Newton's 3rd Law of Motion requires action and reaction.
• Conservation of momentum describes the momentum before an event and after, which is initial momentum and final momentum.
• Conservation of Momentum: p_initial=p_final
• Complete Formula for Conservation of Momentum (Total Momentum) = -(m_1v_1+m_2v_2)=(m_1v_1+m_2v_2)
• m = w/g
• w = mg
• Collision - An encounter between two objects, resulting in exchange of impulse and momentum.
• Elastic Collision - The collision of two bodies is elastic if the kinetic energy before and after the collision is the same.
• Inelastic Collision - When two objects stick together after the collision.
• Inelastic Collision Formula = m_1v_1+m_2v_2=(m_1+m_2)v_f