Force, which causes acceleration
force
force
force
A force.
An outside force to act on it
An outside force to act on it
A change in speed or direction of motion is called "acceleration". If an object's speed or direction of motion changes, then the object is "accelerated".
Velocity is a change in an object's motion OR direction of motion.
Yes, forces can change an object's motion. When a force is applied to an object, it can cause the object to accelerate, decelerate, or change direction. The change in motion is determined by the magnitude and direction of the force applied.
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).
Circular motion would change the direction of an object but would not affect the object's speed.
This is one definition of acceleration (including deceleration) - any change in the speed of motion of a moving object, or in the direction of its motion. Motion is a vector value with both speed and direction.