0
When is acceleration due to gravity positive and when is it negative?
Wiki User
∙ 11y ago
Acceleration due to gravity is negative when an object is moving up. Accl'n due to gravity is positive when an object is moving down (since gravity acts downwards on an object).
^Acceleration due to gravity is always negative, while the acceleration of the ball upward was positive due to what threw it, not gravity.
Wiki User
∙ 14y ago
Wiki User
∙ 14y agoAcceleration is the change in an objects velocity. Velocity is a very important term in physics, which is often confused with speed. The primary difference between the two is that velocity implies a specific direction (for example, 50m/s is speed of an object, whereas 50m/s North/Northeast is a velocity). Acceleration is negative when the speed of an object is increasing in the opposite direction. So, if an object is starting to move west, increasing by 5m/s each second, it's acceleration could be written 5m/s2 west or -5m/s2 east. Furthermore, as previously stated, Acceleration is the change in velocity. This is to say that a decrease in velocity would also be acceleration (the word "deceleration" does not exist in physics as it does in English). So, if the object is slowing down, it will have a negative acceleration in the direction it is moving.
Wiki User
∙ 11y agoIt all depends on the sign conventions you give to the upward and downward directions.
The choice is completely up to you.
-- If you call the direction toward the center of the Earth, downward into the mine, "positive",
then the acceleration of gravity is always positive.
-- If you call the direction away from the center of the Earth, upward into the sky, "positive",
then the acceleration of gravity is always negative.
Wiki User
∙ 10y agoYes. In such a case it's usually called deceleration, but functionally
it's the same thing as acceleration in the opposite direction, and is
referred to as "slowing down".
Wiki User
∙ 12y agoIf you define up (the direction in which height numbers increase) to be the
"positive direction", then the acceleration due to gravity is negative.
Wiki User
∙ 13y agoIt is negative if the upwards direction is defined as positive. Acceleration is downward.
Add your answer:
Earn +20 pts
When can you used the positive acceleration due to gravity and negative acceleration due to gravity?
If you define the "up" direction as "positive", then the acceleration is negative, because it is downward. If you define "down" as positive, then acceleration is negative. You can use any convention; just be sure to be consistent within a particular calculation, to avoid errors.
What is equivalent of acceleration due to gravity?
acceleration due to gravity of earth is 9.8ms-2
What is accileration due to gravity on earth?
Acceleration due to gravityThe acceleration produced in the motion of a body under gravity is called Acceleration.
What is negative accleration?
Acceleration is change in velocity. It is a vector, so some direction is choosen as positive and the opposite direction as negative. Then you have two possibilities;(1) the object is increasing its speed in the negative direction. (2) the object is decreasing its speed in the positive direction. Both of these give negative acceleration. For example; if up is choosen as positive then acceleration due to gravity is always negative because when a projectile is projected up with some initial velocity it decreases its speed on the way up. But on the way down its increasing its speed, in the negative direction.
What is the definition of acceleration due to gravity?
Gravity acceleration g=GM/r2.
When can you used the positive acceleration due to gravity and negative acceleration due to gravity?
If you define the "up" direction as "positive", then the acceleration is negative, because it is downward. If you define "down" as positive, then acceleration is negative. You can use any convention; just be sure to be consistent within a particular calculation, to avoid errors.
What is equivalent of acceleration due to gravity?
acceleration due to gravity of earth is 9.8ms-2
What is negative accleration?
Acceleration is change in velocity. It is a vector, so some direction is choosen as positive and the opposite direction as negative. Then you have two possibilities;(1) the object is increasing its speed in the negative direction. (2) the object is decreasing its speed in the positive direction. Both of these give negative acceleration. For example; if up is choosen as positive then acceleration due to gravity is always negative because when a projectile is projected up with some initial velocity it decreases its speed on the way up. But on the way down its increasing its speed, in the negative direction.
What is accileration due to gravity on earth?
Acceleration due to gravityThe acceleration produced in the motion of a body under gravity is called Acceleration.
How does the acceleration of gravity vary as one goes upward from the surface of the earth?
The farther away from an object on gets, the less powerful the gravitational pull by that object is. As one moves upward from the surface of the earth, the earth's gravitational pull has less of an effect. Since acceleration due to gravity is negative (-9.8 m/s2), the acceleration due to gravity will increase (the acceleration would decrease if you are considering falling down towards the earth to be positive, not negative velocity). This means that the object will not fall as fast, or that of the object is traveling upwards, it will not slow down as rapidly.
What is the acceleration for the pull of gravity?
If you mean acceleration due to gravity it is ~9.8m/s2
What is the definition of acceleration due to gravity?
Gravity acceleration g=GM/r2.
Why it is taken as negative when an object is thrown upwards against gravitation?
When we throw the object upwards we consider that upward direction as positive. Therefore, the velocity in that direction is positive but the acceleration due to gravity is in the opposite direction and so it is considered negative. But when the ball comes down again after reaching a certain height the velocity is in opposite direction to the earlier one and so the velocity now is negative as a result the acceleration is again negative.
What is acceleration due to gravity called?
Acceleration due to gravity means the force due to weight of an object which increases due to the gravitational pull of the earth.
What force that can change when acceleration due to gravity changes?
I suppose you are asking about what forces change when acceleration due to gravity changes. In this case, the formula for forces concerning acceleration due to gravity is as such: fg=mg. When acceleration due to gravity(g) changes, it affects the force of gravity which is also known as the weight of the object. This is shown as fg.
What are the effects of acceleration due to gravity on the time period of a pendulum?
The period of a pendulum (in seconds) is 2(pi)√(L/g), where L is the length and g is the acceleration due to gravity. As acceleration due to gravity increases, the period decreases, so the smaller the acceleration due to gravity, the longer the period of the pendulum.
How is the acceleration of an object in free-fall related to the acceleration due to gravity?
The acceleration in free fall IS the acceleration due to gravity, since "free fall" is the assumption that no forces other than gravity act on the object.
