why does acceleration of an object depends upon the force applied to it?

Question

second law of motion

Answer 1

Physics doesn't do why, only how.

Answer 2

Force is something that creates a change in an object. Acceleration is the change in velocity... If you have a vehicle and you apply more force to the gas pedal, the acceleration is going to increase. The force is the drive to change something (via pressure, or energy of some sort), and changing that will change the output of an object (including the acceleration).

I don't know if I described that well.

Answer 3

Newton discover that rate of change of linear momentum of a body is directly proportional to the force causes it and is in its direction
then F @ d mv /dt ,then F = K m dv/dt (when m is constant)

then F =Km a where a=acceleration

to make K =1 Newton considered one newton is the force if acts on a body of mass 1kg then it aquire it 1m/sec^2

then F = m a

Answer 4

nobody can answer this question.
This is a principle (= issued without any demonstration).
Newton observed that, in a Newtonian system (ie: a fixed reference):
mass*vector acceleration = Total of forces applied to the object
All the experiments have proven that this relation is true, but there is no way to establish a demonstration.

Answer 5

Well don't think you can answer the question within a short space.

But simple answer is acceleration= Force/mass

Answer 6

Because things just don't happen randomly for no reason. So for something to move, something has to cause it to move.