Question

velocity of a moving car increases from 30m/s to 60m/s in 60m/sec. calculate its acceleration​

Answer 1

Explanation:

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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Answer 2

Answer:

0.5ms^-2

Explanation:

a = (v - u)/t

= (60-30)/60

= 30/60

= 0.5ms^-2