In physics, an average external force that acts on an object for a specific period can often be called an impulse. Or in other words, an impulse is defined as the change in linear momentum over a particular period. For instance, if you have a car running on a highway with a constant velocity (v), it hits another object. There must have been some force involved during this collision that changed the direction of a car for a specific period that force and time involved in a whole process is an impulse.
Formula of Impulse
To calculate impulse, you can use the formula listed below, or to find it instantly you can use our impulse calculator.
J = F.Δt
J = Impulse
F = Force driven on an object
Δt = Difference in time (Final time - Initial time)
Whereas the related between impulse and momentum can be described by the illustration listed below:
As the formula of momentum is
p = m.v
Where a change in momentum will be equal to:
Δp = m.Δv
Δp = F.Δt (F = m*a)
Δp = m.a.Δt (Δv = a.Δt)
To calculate the impulse, you can use our Impulse Calculator.
For a precisely learning of an impulse, let us slove an example below:
Suppose a ship hits a glacier with a force of 2000N, whereas the total time interval among hitting in both objects is the 60s, from all the provided data. Find out the impulse of an object.
F = force = 200N
Δt = time interval = 10s
The impulse of an object = ?
To find out the impulse, we will use the formula listed below:
J = F.Δt
Putting values in the formula:
J = (200).(10s) = 2000 N.s