Impulse and Momentum

What is impulse?

→ I = integral → F x dt

• I = impulse of the force

• F = force vector acting on the particle

• dt = infinitely small time

What is impulse for constant force?

→ I = → F x change in time

Impulse - symbol, type, units?

→ I

vector - mag + direction

Newtons seconds

What is momentum equation?

→ L = m v

• L = momentum of particle

• m = mass of particle

• v = velocity of particle

Momentum - symbol, type, units?

→ L

vector

kgm/s or Newton seconds

What is impulse momentum relation?

The impulse of the resultant force acting on a particle over a given time period is equal to the change in linear momentum of the particle.

→ I = change in →L

F x change in time = m x change in v

What is conservation of momentum?

If no external agent exerts force on a system then the total momentum of the system remains constant.