What is impulse and its applications?
IMPULSE:
When you apply a force for a certain amount of time, you create an impulse. In fact, that’s the definition of impulse — impulse equals the force applied multiplied by the time for which it was applied. The equation:
Impulse = F*t
Note that this is a vector equation because the force has a direction; therefore the impulse does as well.
The unit is Newton-second.
In short, Impulse:-
- is a quantity that describes the effect of a net force acting on an object (a kind of "moving force").
- is represented by the symbol J (boldface).
- is the product of the average net force acting on an object and its duration.
J = F̅Δt
- is the force–time integral.
J = ⌠
⌡ F dt
- is a vector quantity (since force is a vector and time is a scalar).
Application:
(i) A cricket player lowers has hands while catching the ball : by doing so the time of impact increases and hence the effect of force decreases.
(ii) When a person falls from a certain height on floor, he receives more injuries as compared to falling on a heap of sand. It is because the Cemented floor does not yield whereas the sand yield there by increasing the time of impact hence decreasing the impact of force.
(iii) The shock absorbers provided in the vehicle helps to travel smoothly on an uneven road. It is because the shockers increases the time of impulse which reduces the force.
IMPULSE:
When you apply a force for a certain amount of time, you create an impulse. In fact, that’s the definition of impulse — impulse equals the force applied multiplied by the time for which it was applied. The equation:
Impulse = F*t
Note that this is a vector equation because the force has a direction; therefore the impulse does as well.
The unit is Newton-second.
In short, Impulse:-
- is a quantity that describes the effect of a net force acting on an object (a kind of "moving force").
- is represented by the symbol J (boldface).
- is the product of the average net force acting on an object and its duration.
J = F̅Δt
- is the force–time integral.
J = ⌠
⌡F dt - is a vector quantity (since force is a vector and time is a scalar).
Application:
(i) A cricket player lowers has hands while catching the ball : by doing so the time of impact increases and hence the effect of force decreases.
(ii) When a person falls from a certain height on floor, he receives more injuries as compared to falling on a heap of sand. It is because the Cemented floor does not yield whereas the sand yield there by increasing the time of impact hence decreasing the impact of force.
(iii) The shock absorbers provided in the vehicle helps to travel smoothly on an uneven road. It is because the shockers increases the time of impulse which reduces the force.
