Because that's the definition of "accelerate".
"Accelerate" doesn't mean "speed up", although that's how everybody who
rides in a car uses the word.
"Accelerate" means "change the speed or the direction of motion, or both".
To accelerate without changing speed, you can change direction. Acceleration is the rate of change of velocity, which includes speed and direction. For example, a car moving at a constant speed on a curved path is constantly changing direction and therefore accelerating, even though its speed remains constant.
When an object accelerates it can change its speed or direction of motion. When it accelerates without changing its direction of motion, it can cover any distance in less time.
No. It is possible to change direction without changing speed. However, it is not possible to change direction without changing velocity.
An object can accelerate towards the center without getting closer by changing its direction of motion. This is known as centripetal acceleration, where the object moves in a circular path around the center without moving closer to it.
Yes, a body can accelerate without changing its speed if it changes direction but not its speed, such as when moving in a circular path at a constant speed. In this case, the body is still accelerating because its velocity (direction of motion) is changing.
To accelerate while walking without changing your speed, you can increase your stride length or frequency. By taking longer steps or moving your legs faster, you can generate more force to propel yourself forward without actually changing your walking speed.
First of all, "acceleration" does not mean "speeding up". It means: any change inthe speed or the direction of motion.When the driver hits the gas or the brake on a straight road, there is acceleration,because the speed of the car is changing.When the car goes around any bend in the road, even if its speed is constant,there is acceleration, because its direction is changing.
Gravity will make any flying object accelerate toward the ground. A force behind a projectile makes it accelerate until the force is removed. When I throw a rock it accelerates until it leaves my hand. A bullet accelerates when the explosion behind it expands the gas.
Consider velocity as consisting of a speed, and a direction. If any of the two changes - that is, if either the speed or the direction changes - then the velocity changes.
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.
No, reflection means that the direction of light is changed.
"Acceleration" means a change of speed or direction of motion, or both.If you change direction ... like turning a corner ... then there is acceleration,even though your speed is constant.Anything traveling on a circular track, even at a constant speed, has constantacceleration.