Yes. Down is towards the centre of the earth.
Take the component of the acceleration along the direction the object is moving. If this component is positive (the acceleration vector, or the relevant component, points in the same direction as the movement), then the object is speeding up.
your still adding but in a different direction
If an object is moving in one direction and slows down, then the direction of its acceleration is opposite to the direction of its motion. This occurs because the acceleration is acting in the direction to oppose the motion and eventually bring the object to a stop.
A moving object with velocity and acceleration vectors in the same direction is accelerating in the direction of its motion. This means that its speed is increasing as it moves in a straight line.
The direction of force influences the direction in which an object accelerates or changes its velocity. If the force is applied in the same direction as the velocity, the object speeds up. If the force is applied in the opposite direction, it slows down.
It isn't. The direction of momentum is the same as the direction of the velocity - of the movement. The direction of acceleration, on the other hand, is the same as the direction of the net force that acts on an object - and this force can be in any direction.
invert
The spelling of "Argentina" is the same in English and Spanish.
If the positive direction was defined at the outset as the direction opposite to the direction in which the object happens to be moving just now, and the object is slowing down, then the acceleration is positive because, algebraically, the object's speed is increasing in the positive direction.
When velocity and acceleration are not in the same direction, the object's speed may be changing. If the acceleration and velocity are in opposite directions, the object will slow down. If they are at right angles to each other, the object will change direction without changing speed.
n o no
what does Australia do the same to japan