when a body body free fall from a height then its acceleration is negative or positive? Related: Motion - Motion in a Straight Line, Class 11, Physics

Question

when a body body free fall from a height then its acceleration is negative or positive? Related:  Motion - Motion in a Straight Line, Class 11, Physics

Answer

A negative velocity means that the body is moving in the negative direction of the y axis—that is, downward. This is true no matter where the body is located. We take the acceleration to be negative (-9.8 m/s2) in all problems dealing with falling bodies

Answer

Acc of body is negative

Answer

Acceleration of a Body in Free Fall

When a body falls freely from a height, its acceleration is negative. This is because the acceleration due to gravity always acts in the downward direction, towards the center of the Earth.

Explanation
- The acceleration due to gravity is denoted by the symbol 'g' and its value is approximately 9.8 m/s^2 on the surface of the Earth.
- As the body falls freely, the only force acting on it is the force of gravity, which causes the body to accelerate towards the Earth.
- Since the acceleration is in the downward direction, it is considered negative in the context of motion in a straight line.
- The negative sign indicates that the acceleration is in the opposite direction to the positive direction of motion (i.e., downwards in the case of free fall).

Sign Convention
- In physics, the convention is to consider downward motion as negative and upward motion as positive.
- Therefore, when a body falls freely from a height, its acceleration is negative due to the downward direction of the force of gravity.

Conclusion
In conclusion, when a body is in free fall, its acceleration is negative as it is directed towards the center of the Earth. This negative acceleration due to gravity causes the body to accelerate downward as it falls.

Answer

When a body falls from height its acceleration is positive because
if we take a freely falling body then that body will fall downwards as the acceleration is in downward direction because of which there is a force in downward direction (F=m×a) ;( a= +g) and thus the acceleration is positive
(for a clearer view ,if the acceleration would have been negative the direction of movement of the bodu would have been opposite which is not in this case ) .

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