Impulsive force and Impulse of a force

(i) Impulsive Force

An impulsive force is a very great force acting for a very short time

on a body, so that the change in the position of the body during the time

the force acts on it may be neglected.

(e.g.) The blow of a hammer, the collision of two billiard balls etc.

(ii) Impulse of a force

The impulse J of a constant force F

acting for a time t is defined as the product

of the force and time.

(i.e) Impulse = Force×time

J=F×t

The impulse of force F acting over a time interval t

is defined by the integral,

J=F∫dt (0 to t)

When a variable force acting

for a short interval of time, then the impulse can be measured as,

J = F average×dt

(i) Impulsive Force

An impulsive force is a very great force acting for a very short time

on a body, so that the change in the position of the body during the time

the force acts on it may be neglected.

(e.g.) The blow of a hammer, the collision of two billiard balls etc.

(ii) Impulse of a force

The impulse J of a constant force F

acting for a time t is defined as the product

of the force and time.

(i.e) Impulse = Force×time

J=F×t

The impulse of force F acting over a time interval t

is defined by the integral,

J=F∫dt (0 to t)

When a variable force acting

for a short interval of time, then the impulse can be measured as,

J = F average×dt