Write only the formula of acceleration and explain accelerated motion and retarted motion from it give two examples of each acceleration and retardation
Answers
Acceleration is defined as the
change in velocity per unit time.
Acceleration is measured in m/
s .
=
Retardation
The negative acceleration is
called retardation or
deceleration. Its unit is same as
acceleration.
Example:
1. Car starts from rest. After 5
seconds, its velocity becomes 10
m/s. Then find its acceleration.
Initial velocity (u) =
Answer:
Formula:
Acceleration = Final velocity - (subtract) initial velocity / time.
a=v-u/t
Explanation:
•Retardation means negative acceleration. Body is said to be retarded if its velocity is decreasing.
~~Example: when car is moving forward with increasing velocity, initial velocity is 25 after 5 second it's velocity is 2.
•Acceleration is rate of change of velocity of object with respect to time. It is also known as positive acceleration. Body is said to be accelerated if its velocity is increasing.
~~Example: when car is moving forward with decreasing velocity, initial velocity is 2 and after 5 second it's velocity is 20.