Physics, asked by Smrutiiii, 1 year ago

What is negative accelaration of a body?

Answers

Answered by adarshbsp903
1

Answer:

mate here is your answer

Explanation:

There is nothing positive or negative about acceleration, or for that matter any other vector. We can choose one direction (or axis) as the + ve direction, then if the acceleration(or velocity) is in that direction we regard it as positive, if it is directed in the opposite direction we regard it as negative.

Let us take the case of a body thrown upwards with some initial velocity. Let us choose the up direction as positive. Then the initial velocity vector is taken positive, and since acceleration is always pointed downwards, it is taken as negative. The body reaches a certain height where its upwards velocity reduces to zero. (Incidentally at the height h reached, the kinetic energy of the body with which it started the journey, just equals the potential energy of the body at that height). Hereafter, the body starts to fall down, acceleration is still negative, and its velocity at any moment is also negative. It is negative as we have chosen the up direction to be positive. When the body arrives in its downwards journey at the start point its velocity is equal in magnitude to the magnitude of the velocity with which the body was thrown up, but its sign is negative. It is so because now the velocity is directed in a direction opposite to our chosen direction which is positive for up.

Answered by lakshaysoni01279473
1

Answer:

Gravitational force acts on all objects in proportion to their masses. But a heavy object does not fall faster than a light object. This is because of the reason that Acceleration= Force/Mass or Force = Acceleration x Mass As force is directly proportional to mass, acceleration is constant for a body of any mass.

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