Impulse and Impulse Force
Forces acting a very short time are called impulse forces.
According to Newton's Second Law of Motion  force can be expressed as
F = dM / dt (1)
where
F = applied force (N, lb_{f})
dM = change of momentum (kg m/s, lb ft/s)
dt = time taken (s)
Eq. (1) can alternatively be expressed as
dM = F dt (1b)
Change in momentum is force times acting time.
Forces that act for a very short time are called impulse forces. The product of the impulsive force and the time it acts is called the impulse. The impulse is equal to the change of momentum caused by the impulsive force and can be expressed as
I = F dt = dM (2)
where
I = impulse (N s)
Example  resulting Velocity after an Acting Force
A force 1000 N is acting on a car with mass 1000 kg in 10 second.
The impulse  or change in momentum  can be calculated
I = dM = (1000 N) (10 s)
= 10000 (N s, kg m/s)
Since momentum can be expressed as
M = m v (3)
where
M = momentum (kg m/s, lb ft/s)
m = mass (kg, lb)
v = velocity (m/s, ft/s)
then the velocity of the car after 10 s can be calculated as
v = (10000 kg m/s) / (1000 kg)
= 10 m/s
= 36 km/h
Related Topics

Dynamics
Motion  velocity and acceleration, forces and torque. 
Mechanics
Forces, acceleration, displacement, vectors, motion, momentum, energy of objects and more.
Related Documents

Angular Motion  Power and Torque
Angular velocity and acceleration vs. power and torque. 
Car  Required Power and Torque
Power, torque, efficiency and wheel force acting on a car. 
Conservation of Momentum
The momentum of a body is the product of its mass and velocity  recoil calculator. 
Distance Traveled vs. Speed and Time  Calculator and Chart
Velocity plotted in time used diagram. 
Flywheels  Kinetic Energy
The kinetic energy stored in flywheels  the moment of inertia. 
Force Ratio
The force ratio is the load force versus the effort force. 
Formulas of Motion  Linear and Circular
Linear and angular (rotation) acceleration, velocity, speed and distance. 
Impact Force
Impact forces acting on falling objects hitting the ground, cars crashing and similar cases. 
Jet Propulsion
Calculate the propulsive discharge force or thrust induced by an incompressible jet flow. 
Kinetic Energy
Energy possessed by an object's motion is kinetic energy. 
Projectile Range
Calculate the range of a projectile  a motion in two dimensions. 
Rolling Resistance
Rolling friction and rolling resistance. 
Support Reactions  Equilibrium
Static equilibrium is achieved when the resultant force and resultant moment equals to zero.