Question

A car is moving ina straight line from rest and travels a distance 20m in 4 s with constant acceleration . Calculate this acceleration ?​

Answer 1

Answer:

Hi,

Explanation:

Acceleration is 2.5 m/s².

Explanation:

To find : Acceleration of car.

We have,

Initial velocity, u is 0 m/s.

Distance, s is 20 m.

Time, t is 4 s.

We know,

Second equation of motion :

• s = ut + 1/2 at²

[Where, a is acceleration]

Now, Put s, u and t in formula :

⟶ 20 = 0 × 4 + 1/2 × a × (4)²

⟶ 20 = 0 + 1/2 × a × 16

⟶ 20 = 16a/2

⟶ 20 × 2 = 16a

⟶ 40 = 16a

⟶ 40/16 = a

⟶ a = 2.5

Thus,

Acceleration of car is 2.5 m/s².

Answer 2

Explanation:

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