Medium
What is impulse of force? Write its unit and dimension.
(N/A) Impulse of a force is defined as the product of the average force acting on an object and the time interval for which it acts.
Mathematically,$Impulse (J) = F_{avg} \times \Delta t$.
It is also equal to the change in momentum of the object,i.e.,$J = \Delta p = m(v - u)$.
Unit: The $SI$ unit of impulse is $Newton-second$ $(N \cdot s)$ or $kilogram-meter$ per second $(kg \cdot m/s)$.
Dimension: Since impulse is equal to change in momentum $(p = mv)$,its dimension is $[M^1 L^1 T^{-1}]$.
Mathematically,$Impulse (J) = F_{avg} \times \Delta t$.
It is also equal to the change in momentum of the object,i.e.,$J = \Delta p = m(v - u)$.
Unit: The $SI$ unit of impulse is $Newton-second$ $(N \cdot s)$ or $kilogram-meter$ per second $(kg \cdot m/s)$.
Dimension: Since impulse is equal to change in momentum $(p = mv)$,its dimension is $[M^1 L^1 T^{-1}]$.
Explore More
Similar Questions
$A$ particle moves in the $x-y$ plane under the influence of a force $\vec{F}$ such that its linear momentum is $\vec{P}(t) = \hat{i} \cos(kt) - \hat{j} \sin(kt)$. If $k$ is a constant,the angle between $\vec{F}$ and $\vec{P}$ will be:
MediumIIT 2007
View SolutionConsider the following statement: When jumping from some height,you should bend your knees as you come to rest,instead of keeping your legs stiff. Which of the following relations can be useful in explaining the statement?
Easy
View Solution$A$ particle of mass $m$ strikes a wall with speed $v$ at an angle $30^{\circ}$ with the wall elastically as shown in the figure. The magnitude of impulse imparted to the ball by the wall is
Difficult
View Solution$A$ jet of water with cross-sectional area $A$ strikes a wall at an angle $\theta$ with the normal to the wall and rebounds elastically. If the density of water is $\rho$ and the velocity is $v$,what is the force exerted on the wall?
Medium
View Solution$A$ ball of mass $m$ moves with speed $v$ and strikes a wall normally and is reflected back normally. If its time of contact with the wall is $t$,find the force exerted by the ball on the wall.
Easy
View SolutionVedclass Products
For Students
Vedclass Test Series
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Live online exams with unlimited students, 360° analytics & white-label branding.
See Demo