Name: Pendulum: Measurement of Time
Uploaded: 2019-07-19
Duration: 3 min 15 s
Description: Machines have made our lives simple by reducing our effort. How are machines classified? What are some simple machines we use in everyday life? Let's explore.

Question

Define variable velocity. Give one example

Accepted Answer

The different types of velocities are uniform velocity, variable velocity. The rate of change of displacement of a moving body with time is called its velocity. This is a vector quantity. A body is said to be moving with uniform velocity if it covers equal distances in a particular direction in equal intervals of time. Example: A car moving on a straight road with constant speed has uniform velocity.

The velocity of a body can be variable either due to a change in its magnitude or its direction or both magnitude and direction. If a body moves unequal distances in a particular direction in equal intervals of time, or it moves equal distances in equal intervals of time, but its direction of motion does not remain the same, then the velocity of the body is said to be variable (or non-uniform). Examples: The motion of a freely falling body is with variable velocity because although the direction of motion of the body does not change, the speed continuously increases. The motion of a body in a circular path even with uniform speed is with variable velocity because, in a circular path, the direction of motion of the body continuously changes with time.

S No	Time ( $s$ )	Distance ( $m$ )
1	0	0
2	1	5
3	2	10
4	3	15
5	4	20
6	5	25
7	6	30

Define variable velocity. Give one example

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