Question

Q.9 A body starts from rest and travels with an acceleration of 1.5 m/s2. After t seconds its velocity is 6 m/s . Then t is....? (a) 10 s (b) 5 s (c) 4 s (d) 6 s​

Answer 1

Answer:

Option (c) is correct. 4 s or Seconds .

Explanation:

To find : t means time taken.

Solution :

Given that,

• Acceleration, a is 1.5 m/s².
• Initial velocity, u is 0 m/s.
• Final velocity, v is 6 m/s.

We know,

• a = (v - u)/t

Where,

• a is Acceleration (in m/s²).
• v is final velocity (in m/s).
• u is Initial velocity (in m/s).
• t is time taken (In seconds).

Put all values in formula :

$\implies$ 1.5 = (6 - 0)/t

$\implies$ 1.5 × t = 6

$\implies$ t = 6/1.5

$\implies$ t = 4

Therefore,

t (time taken) is 4 seconds .

Answer 2

Answer:

Given :-

A body starts from rest and travels with an acceleration of 1.5 m/s². After t seconds its velocity is 6 m/s

To Find :-

Time taken

Solution :-

We know that

a = (v - u)/t

t = (v - u)/a

t = (6 - 0)/1.5

t = 6/1.5

t = 60/15

t = 4 s

Hence

Time taken is 4 s

Explanation: