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2 years ago

In the video, you saw that models must sometimes be changed. why does that happen?

Physics

2 answers:

Zielflug [23.3K]2 years ago

5 0

Models often need to be changed and updated based on new evidence.

inn [45]2 years ago

4 0

Because scientific data and discoveries will always keep coming out, so models must be updated from time to time.

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3 years ago

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makkiz [27]

Answer:

Acceleration of the object is $4\ m/s^2$ .

Explanation:

It is given that, the position of the object is given by :

$r=[2\ m+(5\ m/s)t]i+[3\ m-(2\ m/s^2)t^2]j$

Velocity of the object, $v=\dfrac{dr}{dt}$

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$a=\dfrac{d^2}{dt^2}([2\ m+(5\ m/s)t]i+[3\ m-(2\ m/s^2)t^2]j)$

Using the property of differentiation, we get :

$a=\dfrac{d^2r}{dt^2}=-4\ m/s^2$

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2 years ago

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Kobotan [32]

Answer:

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