Question

A body starts from rest and accelerates for 5m/s. Calculate the time taken by the body to cover a distance of 1km.​

Answer 1

Answer:

20 sec

Explanation:

Given that a body starts from rest and accelerates for 5m/s² and distance is 1 km.

We need to find out the time taken by the body.

As body starts from rest. So, initial velocity, (u) is 0 m/s.

Given Distance is 1 km

1 km = 1000 m

So, distance is 1000 m.

Now,. using second equation of motion:

s = ut + 1/2 at²

Substitute the known values in the above formula,

→ 1000 = (0)t + 1/2 × 5t²

→ 1000 = 0 + 1/2 × 5t²

→ 1000 = 5t²/2

→ 2000/5 = t²

→ 400 = t²

→ t = √400

→ t = 20

Hence, the time taken by the body is 20 seconds.

Answer 2

$\huge20 \: sec$

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