Four people return home from work and walk up the stairs to their own apartments in the same building which person is getting th
1 answer:
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Answer:
400k
Explanation:
Formula for KE =
Plug in:
KE =
KE = × 2000 × 20^2
Solve:
1000 × 400 = 400,000 or 400k
Hope this helped.
The velocity of the particle is given by the derivative of the position vector:
(a) The particle is moving in the <em>x</em>-direction when the <em>y</em>-component of velocity is zero:
But we want <em>t</em> > 0, so this never happens, unless 2<em>c</em> = <em>d</em> is given, in which case the <em>y</em>-component is always zero.
(b) Similarly, the particle moves in the <em>y</em>-direction when the <em>x</em>-component vanishes:
We drop the zero solution, and we're left with
In the case of 2<em>c</em> = d, this times reduces to <em>t</em> = <em>c</em>/(6<em>c</em>) = 1/6.