Instantaneous Acceleration Calculation

[cb. ram]

what will be the instantaneous acceleration when a force act on a body and how to calculate it?for ex if a body of mass 10kg is acted upon by a force of 100N then it accelerate by 10ms^-2 by it take some time to reach this acceleration which can be found out by equation of laws of motion but i want to find out the instantaneous acceleration after the body is subjected to a force ?how to calculate it?

 

[A.T.]

if a body of mass 10kg is acted upon by a force of 100N then it accelerate by 10ms^-2 by it take some time to reach this acceleration

No, this is the instantaneous acceleration.

 

[cb. ram]

this can also be the actual acceleration .can be found out by the equation of motion(if the friction is negligible)

 

[pbuk]

If the force is instantaneous, so is the acceleration. Of course in the real world forces are never instantaneous (due to slack in the system, compressibility of materials etc.) so if you want to know how long it takes to reach this acceleration you need to know how long it takes to reach this force.

Note that the rate of change of acceleration is sometimes called "jerk", which is fairly appropriate.

 

[A.T.]

can be found out by the equation of motion(if the friction is negligible)

The equation (Newtons 2nd) relates instantaneous acceleration to instantaneous net force, which includes friction.

 

[cb. ram]

sorry friends i just confused it .in the v-t graph if the plot is constantly increasing then the acceleration is constant so instantaneous acceleration should be=actual acceleration .so if the force continuously changes the acceleration should also be continuously changing(both force and the acceleration are then instantaneous).thank you friends am i right

 

[dean barry]

acceleration (a) at any instant depends on net force (f) and mass (m):
a = f / m