if an objects velocity doesn't tell us about the net force on an object, what characteristic of its motion does?

Physics

2 answers:

aleksklad [387]3 years ago

5 0

The acceleration of the motion tells us about the net force acting on the body

Phoenix [80]3 years ago

4 0

Of the motion tells us about the net force acting on the body

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kupik [55]

Answer:

Explanation:

The position is $r(t) = [3.0 \text{ m} - (4.00 \text{ m/s})t]\hat{i} + [6.0 \text{m} - (8.00 \text{ m/s}^2 )t^2 ]\hat{j}$ .

The velocity is the first time-derivative of r(t).

$v(t) = \dfrac{d}{dt}r(t) = -4.00\,\hat{i} -16t\,\hat{j}$

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$a(t) = \dfrac{d}{dt} v(t) = -16\hat{j}$

Since a(t) does not have the variable t, it is constant. Hence, at any time,

$a = -16\hat{j}$

Its magnitude is 16 m/s².

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