Question

a particle start with constant velocity of 10ms-1 it covers distance 20m along a straight line in two seconds what is acceleration​

Answer 1

Answer:

Acceleration =0m/sec²

Hence the acceleration is 0 because the velocity remains constant.

Explanation:

Given:

Initial velocity of the particle = 10m/sec

Distance covered by the particle = 20m

Time taken by the particle = 2sec

Acceleration is the rate of change of velocity.

Here:

The initial velocity = final velocity.

So:

$Acceleration = \frac{final \: velocity - initial \: velocity}{time \: taken}$

Hence:

Hence: Acceleration is 0 m/sec²

Or in other method :

Here:

In order to find the acceleration we will use 2nd equation of motion i.e

$S = ut + \frac{1}{2} {at}^{2}$

Where:

s is the distance,

u is initial velocity,

a is acceleration and

t is the time taken.

Now:

Putting the required values in the equation we get,

$= > 20 = 10 \times 2 + \frac{1}{2} a \times {2}^{2} \\ = > 20 = 20 + \frac{1}{ \cancel2} \times a \times 2 \times \cancel2 \\ = > 20 - 20 = 2a \\ = > 0 = 2a \\ = > \boxed{a = 0}$

Answer 2

               ✪Full Explanaion✪

After the solution of this question  

we have to recape that 'what is

acceleration? '

======================

Answer : The rate of change of velocity of

an object with respect to time is known

as acceleration.

======================

Now we have to recape the three

equations of motion.

• v = u + at  

• s = ut + 1/2 at²

• v² = u² + 2as  

======================

Now come to the your question

★ Given :

   Initial velocity of particle (u) = 10 m/s

   Distance covered by particles (s) = 20 m

   Time taken (t) = 2 sec

======================

★ To find :

   Acceleration of given particle .

======================

    So,

    According to the question

    we have intial speed (u),

    distance (s) and time (t)

    ∴ here, we use second eq.

      of motion

======================              

★  Let's solve :

             ↳

             

                ⇒ s = ut + 1/2 at²

               ⇒20 = 10 × 2 + 1/2a ×  (2)²

               ⇒20 = 10 × 2 + 1/2a × 4

               ⇒20 = 20 + 2a

              ⇒20-20 = 2a

              ⇒0 = 2a

          ∴ a = 0 m/s²

======================

✸Answer :

  0 m/s²