Question

An object is travelling with a constant speed of 6 m/s for 3 s. What is the magnitude of its acceleration?

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Answer 1

Explanation :

It's given that an object is travelling with constant speed of 6 m/s for 3 s.

What is magnitude of acceleration?

What is acceleration?

Acceleration is rate of change in speed or velocity.

If it's against motion it's called retardation.

[Note : Retardation = - Acceleration ]

Now we have constant speed of 6 m/s which works for 3 s.

We can simply say that there is no acceleration working as speed remains constant. So, acceleration = 0

Let's prove this mathematically too.

Constant speed = 6 m/s

∴ Initial speed(u) = 6

∴ Final speed(v) = 6

Time(t) = 3 s

We know 1st equation of motion :-

⇒ v = u + at

⇒ 6 = 6 + 3a

⇒ 6 - 6 = 3a

⇒ 0 = 3a

⇒ a = 0/3

⇒ a = 0

∴ Magnitude of acceleration = 0 m/s²

Answer 2

Answer:

Please find attachment

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