A car moving with initial velocity of 60m/s is brought to rest in 30 sec. calculate the accelration?
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Given :
▪ Initial velocity = 60m/s
▪ Final velocity = zero (i.e., rest)
▪ Time interval = 30s
To Find :
▪ Acceleration of car.
Concept :
☞ Acceleration is defined as the rate of change in velocity.
☞ It is a vector quantity.
☞ It has both magnitude as well as direction.
☞ It can be positive, negative or zero.
☞ SI unit : m/s²
❇ Formula : a = (v - u) / t
- a denotes acceleration
- v denotes final velocity
- u denotes initial velocity
- t denotes time
Calculation :
→ a = (0 - 60) / 30
→ a = -60 / 30
→ a = -2 m/s²
[Note : -ve sign shows retardation.]
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