No. Acceleration only affects velocity in one particular direction (same direction as acceleration). Speed is the summation of velocities in all directions.
Yes because it's a vector it has magnitude and direction.
No.
"Constant" means that regardless of when you measure it, the result is always the same. "Velocity" means speed and its direction. "Acceleration" means the rate at which speed is changing, and the direction in which it's changing.
In that case, the speed will increase.
Speed increase constantly.
Speed increase constantly.
The acceleration is the same direction of the velocity
no
acceleration=ratio of change in velocity in a specific direction to time. speed=ratio of distance to time.
Acceleration is the rate of change of velocity over time, so velocity must always be changing if the object is accelerating. HOWEVER, you said speed which means only magnitude, not direction. If you stay the same speed, but change direction then you are accelerating. Simple answer: when you are going the same speed in a circle - velocity changes, therefore acceleration changes.
Acceleration is the rate of change of VELOCITY, not of SPEED. If the velocity changes, there is acceleration. It is enough for the direction to change.
Acceleration is always towards the center. In other words, for a person on the merry-go-round, the direction of the acceleration changes all the time; therefore the acceleration changes.
in the same direction as her motion.
Yes. f=ma the direction of acceleration is the direction of the force and vice versa.