Which of the following statements explains why a race car going around a curve is accelerating, even if the speed is constant? A
. The car is accelerating because the magnitude as well as the direction of velocity is changing: B. The car is accelerating because the magnitude of velocity is changing: C. The car is accelerating because the direction of velocity is changing: D. The car is accelerating because neither the magnitude nor the direction of velocity is changing
OPTION C The car is accelerating because the direction of velocity is changing explains why a race car going around a curve is accelerating, even if the speed is constant
When a body is in uniform circular motion ( constant speed ), it will continuously cheanges its direction and so the body is accelerating
The rate at which an item changes its velocity is known as acceleration, a vector variable. If an object's velocity is changing, it is accelerating.
As a vector quantity, acceleration has a direction attached to it. The acceleration vector's direction is determined by two factors: if the thing is slowing down or speeding up the direction the thing is travelling in (+ or -)
The following general rule is used to calculate acceleration:
An object's acceleration will be in the opposite direction of its velocity if it is slowing down.
You may use this basic concept to determine if an object's acceleration is positive or negative, to the right or left, up or down, etc.
Many substances do not dissolve in water and that is because they are non-polar and do not interact well with water molecules. A common example is oil and water. Oil contains molecules that are non-polar, thus they do not dissolve in water.
