9m/s2
Such an object is said to travel at a constant speed. If it doesn't change direction, it is also said to travel at constant velocity.
The change in speed each second is the same whether the ball is going upward or downward
The speed of an object in free fall near the earth's surface is always 9.8 meters (32.2 feet) per second morethan it was one second earlier.
-- The speed can increase. -- The speed can decrease. -- The path can bend from a straight line. Each of these is an example of 'acceleration'.
A force, or several forces that don't all cancel each other.
Such an object is said to travel at a constant speed. If it doesn't change direction, it is also said to travel at constant velocity.
There is a huge difference between constant speed and constant acceleration. Constant speed is when the object is travelling constant, no change in its velocity and acceleration or in other words no extra force to speed up. Constant acceleration when the object is acceleration constant, it means that the speed of the object is change at the same rate each second. The acceleration rate at which the object is travelling is constant. for example, when a car is stationary at a traffic light and it starts acceleration, picking up speed but the rate of acceleration will not constant because the amount of force applied differs each second due to the acceleration rate.
The change in speed each second is the same whether the ball is going upward or downward
The speed of an object in free fall near the earth's surface is always 9.8 meters (32.2 feet) per second morethan it was one second earlier.
-- The speed can increase. -- The speed can decrease. -- The path can bend from a straight line. Each of these is an example of 'acceleration'.
A force, or several forces that don't all cancel each other.
No. Since the speed of a falling object keeps increasing, it falls through more distance in each second than it did in the second before.
An acceleration is any change in an object's velocity, so each of the following would be an acceleration:The speed increases.The speed decreases.The speed remains constant, but the direction changes.It is important to understand that "velocity" is a vector, consisting of a speed, and a direction.
It increases by 20 centimetres per second in the given direction for each second that elapses.
what is speed at a specific instant in time
2km/h
That would be called a "constant speed".(Not 'velocity', since no information about the direction of its motion has been given.)