Question

What is impulsive force?

Answer 1

Impulsive forces:

1. An impulsive force is one that only operates on an item for a brief period of time.
2. An impulsive force is generated mainly by a collision that changes the velocity or momentum of one or more of the collision's items.
3. In contrast to being supported by non-impulsive forces, impulsive forces act on a body and cause it to change its state of motion for a brief time.
4. A non-impulsive force is identical to the weight of the body, however, an impulsive force is a driving body abruptly colliding with another.
5. It is defined as the rate at which momentum changes. The momentum of a body is $p=mv$, where $m$ is the mass of the body and $v$ is the velocity of the body. So, the rate of change of momentum is given as $\frac{∆p}{∆t}=\frac{m∆v}{∆t}$.

And the impulse is given as

$\mathrm{Impulse}=\mathrm{mv}-\mathrm{mu}$ (momentum change)

$\mathrm{Impulsive}\mathrm{force}=\frac{\text{Impulse}}{\text{time}}=\frac{\mathrm{mv}-\mathrm{mu}}{\text{time}}$

Example of impulsive force:

Long Jump:

1. When competitors land on the long jump pit, it is filled with sand to improve reaction speed.
2. This is done to reduce the impulsive force exerted on the athlete's leg since impulsive force is inversely related to response time.

Thus, the enormous amount of force exerted by two colliding objects on each other is impulsive force.