If a 20-kg object dropped in air has a terminal speed of 60 m/s, what was its acceleration at 30 m/s

a = 7.35 m/s²

Explanation:

Given that,

Mass of a object, m = 20 kg

The terminal speed of the object,

We need to find its acceleration at 30 m/s.

It is a case on Newton's second law of motion. Its mathematical form can be given by :

Here, is the Drag force,

Putting all the values,

....(1)

Here, a = 0 Firstly we find the value of k (constant)

Now, put the value of k in equation (1) and here put v = 30 m/s

So, its acceleration at 30 m/s is 7.35 m/s².

c) up

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