Yes. For example, a ball thrown vertically in the air has a positive velocity (upwards) but a negative acceleration due to gravity (downwards at ~9.81 m/s^2), until it begins to move downwards.
Yes. The sign on velocity denotes direction. The sign on acceleration determines if
the object is speeding up or slowing down. If the sign on acceleration matches the
velocity then the object is speeding up. If the sign is opposite then the object is
slowing down.
-- A car is slowing down for a red light.
Velocity is forward. Acceleration is backward.
They're 180 degrees different.
-- A ball is tossed upward.
Before it reaches the peak, velocity is upward, acceleration is downward.
They're 180 degrees different.
-- A satellite or a roulette ball is in a circular orbit.
Velocity is tangent to the circle. Acceleration is toward the center.
They're 90 degrees different.
-- A canonball is fired horizontally.
As it leaves the muzzle, its velocity is horizontal, the acceleration of gravity is vertical.
They're 90 degrees different.
The horizontal component of its velocity doesn't change, but the vertical component grows.
The resultant velocity vector points more down as time goes on.
The angle between velocity and acceleration (of gravity) continually shrinks,
starting at 90 degrees and decreasing until the ball lands somewhere.
acceleration is the increase of speed in a moving object. velocity is the speed and direction of a moving object.
yes, if the acceleration is in the opposite direction of the velocity.
Any falling object has acceleration and velocity vectors in the same direction.
Yes. Acceleration is a change in velocity. As velocity is a vector (direction and speed) changing either the speed or direction will change the velocity and thus be an acceleration (or decelleration)
Anytime an object is slowing down, its acceleration is in the opposite direction to its velocity.
acceleration is the increase of speed in a moving object. velocity is the speed and direction of a moving object.
yes, if the acceleration is in the opposite direction of the velocity.
Any falling object has acceleration and velocity vectors in the same direction.
FALSE. Acceleration is the change of speed and/or direction of an object.
The change in velocity is just the change in velocity. The RATE of change of velocity - how quickly velocity changes - is usually called "acceleration".
Yes. Acceleration is a change in velocity. As velocity is a vector (direction and speed) changing either the speed or direction will change the velocity and thus be an acceleration (or decelleration)
Anytime an object is slowing down, its acceleration is in the opposite direction to its velocity.
Yes, acceleration is the how the velocity changes. This also includes when an object turns
Acceleration is the change in velocity of an object over time. Take note that velocity is a vector quantity which means that it has magnitude and direction...Thus...An object undergoes acceleration when:1. there is a change in the magnitude of the velocity (speed) of an object.2. there is a change in direction of an object.3. it changes both in direction and magnitude.
An object can have only one velocity at any point in time. That velocity can have components in two (or more) directions.If acceleration is constant (but non-zero), then the velocity in any direction other than perpendicular to the direction of the acceleration must change.
No. The velocity of an object is how fast it is moving as well as the direction of the motion. So when considering one dimension, the velocity can be positive or negative. The speed of the object is simply the magnitude (absolute value, in the case of one dimension) of the velocity, with no direction. Acceleration is the change in velocity and does include direction. So if an object has a positive velocity (in one dimension) and its speed increases, the acceleration is negative. However, if the speed of an object moving the negative direction increases, then the acceleration is negative, because the velocity becomes "more negative."
The direction of angular acceleration comes from whether the angular speed of the object is clockwise or counterclockwise and whether it is speeding up or slowing down.The direction of the angular acceleration will be positive if the angular velocity is counterclockwise and the object's rotation is speeding up or if the angular velocity is clockwise and the object's rotation is slowing downThe direction of the angular acceleration will be negative if the angular velocity is clockwise and the object's rotation is speeding up or if the angular velocity is counterclockwise and the object's rotation is slowing downThe angular acceleration will not have a direction if the object's angular velocity is constant