# Impulse Definition

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

Where,

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)

Note:

To calculate the impulse, you can use our Impulse Calculator.

### Example

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.

Given data

F = force = 200N
Δt = time interval = 10s

To Find

The impulse of an object = ?

Solution

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