Question
Define:
(i) Speed (ii) Velocity. Give two differences between speed and velocity.
(i) Speed (ii) Velocity. Give two differences between speed and velocity.
✓
Answer
(i) Speed: The distance covered by a body in a unit time is called its speed. It is also defined as the rate of change position of a body in any direction.
speed = distance/time
(ii) Velocity: "Rate of change of displacement with time" is called velocity, or "The time rate of change of displacement of an object" is called the velocity.
V = distance/time
Differences between speed and velocity
Speed:
1. The rate of change of position of a body in any direction is known as its speed.
2. It is a scalar quantity.
3. It can be positive or zero.
Velocity:
1. The rate of change of position of a body in a particular direction is known velocity.
2. It is a vector quantity.
3. It can be positive, negative or zero.
speed = distance/time
(ii) Velocity: "Rate of change of displacement with time" is called velocity, or "The time rate of change of displacement of an object" is called the velocity.
V = distance/time
Differences between speed and velocity
Speed:
1. The rate of change of position of a body in any direction is known as its speed.
2. It is a scalar quantity.
3. It can be positive or zero.
Velocity:
1. The rate of change of position of a body in a particular direction is known velocity.
2. It is a vector quantity.
3. It can be positive, negative or zero.
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