Here's why:

* Impulse is a measure of the change in momentum of an object.

* Momentum is the product of an object's mass and velocity.

* Since force is the rate of change of momentum, the longer a force is applied, the greater the change in momentum, and therefore, the greater the impulse.

Mathematically:

* Impulse (J) = Force (F) x Time (t)

* Impulse (J) = Change in momentum (Δp)

Examples:

* A baseball bat hitting a ball. The bat applies a force over a short time, resulting in a large impulse that changes the ball's momentum significantly.

* A car braking to a stop. The brakes apply a force over a longer time, resulting in a smaller impulse compared to the bat hitting the ball.

Let me know if you have any other questions!