The rate of motion of an object is to find out the distance travelled by the object in unit time. What is this quantity known as?
Show answer & explanation
Correct answer: B
Explanation
Correct Answer:
Option 2: Speed
Explanation:
Speed is defined as the distance travelled by an object per unit time. It represents the rate of motion and is a scalar quantity, meaning it has only magnitude and no direction. The formula for speed is distance divided by time. It is widely used in daily life, such as measuring the motion of vehicles. The key difference between speed and velocity is that velocity includes direction, while speed does not.
Additional Facts:
Option 1: Distance is total length covered, not rate.
Option 3: Displacement includes direction.
Option 4: Velocity includes direction, unlike speed.
Probable Exam Questions:
Q: What is the formula of speed?
A: Distance divided by time
Q: What is the difference between speed and velocity?
A: Velocity includes direction, speed does not
Q: What type of quantity is speed?
A: Scalar quantity
Q: What is the SI unit of speed?
A: Meter per second