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Answered 2009-07-04 16:32:13

Positive in downard direction because in this direction your initial vilocity will be higher then your final velocity. and vice versa (Negative in upward direction)

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What is the difference between infiltration and seepage?

infiltration is strictly downward motion in the direction of gravity while seepage can be in any direction.


How gravity and air resistance different?

Gravity has a constant acceleration value (9.8m/s^2) and acts downward always. Air resistance is as its name suggests a force that only acts when an object is moving, and it can act in any direction (always opposite the direction of motion).


How does gravity affect horizontal motion and vertical motion of projectile motion?

Ignoring air resistance, gravity has no effect at all on horizontal motion, but imparts a downward acceleration of 9.8 meters (32.2 feet) per second2 on the vertical motion.


How does slope compare with acceleration due to gravity?

Acceleration due to gravity (free fall) is a downward (negative) motion. On a position-time graph, the slope representing free fall will be a downward curve. On a velocity-time graph, the slope representing free fall will be a straight line with a negative (downward) slope.


Is it possible that the velocity of an object be in a direction other than the direction of accalaration?

Of course. When you toss a ball or a stone UP into the air, thenfor all the time until it reaches its peak and begins to fall, its velocityis upward but its acceleration is downward.The acceleration of gravity is always downward, but material objectsfrequently have upward velocities.In any situation where an object's acceleration is opposite to its velocity,a Physicist would say that the object is "slowing down".Another example is motion at a steady speed in a circle. In that case, theacceleration and velocity are always perpendicular. The acceleration actsonly to change the direction of the object's motion, but not its speed.


Should acceleration and velocity always have the same direction in a downward motion?

If you are talking about free fall, acceleration due to gravity and velocity will both be negative, until terminal velocity is reached, at which point the falling object is no longer accelerating and has constant negative velocity.


Is acceleration always in the direction of motion?

No. Acceleration may point in any direction at all with respect to the direction of motion.Acceleration in the direction of motion increases the speed in the same direction.Acceleration in the opposite direction leads to an effect commonly referred to as "slowing down".Acceleration in any other random direction bends the path of the motion, and may increase or decrease the speed.


The downward force of gravity and the upward force of air resistance on a ball are both 5N What is the ball's acceleration?

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What is downward motion?

Downward motion is defined as the movement of one's center of gravity towards the performance surface.


What is the difference between negative acceleration and positive acceleration?

You arbitrarily define a direction to be positive and the direction opposite to it is then negative. Measurements in the first direction are positive and those in the second are negative. For example, if you are considering the motion of a ball that is thrown upwards, you could choose the upward direction to be positive. Then the initial velocity of the ball would be positive but the acceleration due to gravity (which is acting in the downward direction) would be negative acceleration. But you could, instead, choose to call the downward direction positive. In that case, the initial velocity of the ball would be negative and the acceleration due to gravity would be positive acceleration. So it is all relative. Another way to look at it is that if the object being studied is slowing down it is negative acceleration and if it is speeding up it is positive. [Unfortunately that does not work with the above example because the object is slowing down initially and then speeding up.]


What type of motion is exhibited by a ball thrown up uniform or non uniform motion why?

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What is accileration due to gravity on earth?

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What kind of motion does the speed and direction not change?

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What are example of motion in which the acceleration is in the direction of motion?

an automobile starting from rest will accelerate in the direction of motion


Why does the acceleration of an object rolled down an incline increase as the angle of incline increases?

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How does gravity affect two componets of projectile motion?

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True or false acceleration is a change in motion?

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How does the direction of acceleration affect the directions of motion?

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When force is perpendicular to the direction of motion is work done?

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When you throw a ball upwards what happens to its speed while it is going up?

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How does gravity affect dance?

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