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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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0infiltration is strictly downward motion in the direction of gravity while seepage can be in any direction.

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).

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.

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.

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.

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.

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.

0 meters per second squared As stated above, the ball will have zero acceleration due to the equal upward and downward forces, presuming the ball is moving or attempting to move in an upward or downward direction. The ball, in fact, will not be moving at all in this situation, but will be suspended in its position. If you are referring to an acceleration or motion in a direction that is not vertical, you will need to provide other information in order to get an answer.

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

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.]

If by motion you mean velocity it is non uniform, because the velocity is changing due the acceleration of gravity slowing it down to zero. Then at the maximum height motion is reversed and it accelerates downward back to its original speed but in the opposite direction.

Yes. Acceleration is defined as a change of speed and/or direction of motion. If the speed and direction of motion are constant, then there is no acceleration.

Acceleration due to gravityThe acceleration produced in the motion of a body under gravity is called Acceleration.

Acceleration in motion refers to a change in speed or direction of that object's motion. So a type of motion in which speed and direction do not change is a motion in which the acceleration is constant (i.e. unchanging).

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

The contribution of the acceleration of gravity in the direction of motion increases as the angle of the incline increases. Or in other words, as the angle between the direction of motion and the force of gravity goes to zero, the acceleration of the object goes to the gravitational acceleration. a = g cos(theta) Where theta is the angle between the direction of motion and verticle, which is in fact (theta = 90 - angle of the incline)Where a is the acceleration of the object down the incline plane and g is the acceleration due to gravity. Theta is the angle between the direction of motion of the accelerating object and the acceleration of gravity. Initially, the angle between a and g is 90 degrees (no incline) and therefore g contributes nothing to the objects acceleration. a = g cos(90) = 0 As the angle of the inclined is increased, the angle between a and g approaches zero, at which point a = g. With no other forces acting upon the object, g is its maximum acceleration.

Divide the motion into a horizontal and a vertical component. The horizontal component won't be affected by gravity. The vertical component will get a downward acceleration of 9.8 meters per second per second.

'Acceleration' is a change in the speed and/or direction of motion.

The acceleration will either speed up or slow down an object's motion in the direction it is applied. Any change in speed or direction is considered acceleration.

No. At least not by the force that's perpendicular to the motion. When you push a baby stroller (or a car), you do work, but the force of gravity, downward and perpendicular to the motion, doesn't.

Its speed decreases at a nearly constant rate of decrease in speed. When a body is in motion due to gravitational force alone, it has constant acceleration downward ... the "acceleration due to gravity". If its velocity is upward, and its acceleration is downward, then the result is a decrease in speed.

No. It will accelerate the diver downward only.

In low gravity- less effort and slow motion in upward and downward movement. in higher gravity - more effort and slow motion in upward movement and vice versa for downward movement.

It pushes them downward

There is no acceleration if it is slowing down. It is decelerating.

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