Speed, unlike acceleration or velocity, does NOT specify _
• Distance
• Mass
• Direction
• Time
• Direction
Speed, unlike acceleration or velocity, does NOT specify direction.
To understand why, let's first define what speed, acceleration, and velocity mean.
- Speed refers to how fast an object is moving and is calculated by dividing the distance covered by the time it took to cover that distance. It is a scalar quantity with magnitude only. Speed does not take into account the direction of motion.
- Acceleration, on the other hand, refers to the rate at which an object's velocity changes. It is the change in velocity over time. Acceleration can be positive, negative, or zero, indicating whether an object is speeding up, slowing down, or maintaining a constant speed.
- Velocity is a vector quantity that includes both speed and direction. It measures the displacement of an object per unit of time. Velocity specifies both how fast an object is moving and in which direction it is moving.
Now, let's consider the statement that speed does not specify direction. Since speed is a scalar quantity, it only indicates the magnitude or numerical value of how fast an object is moving. It does not provide any information about the direction in which the object is moving. So, when discussing speed, we only focus on how fast an object is moving and disregard the direction.