3 years ago

A 100 meter sprinter reduces his time from 10.23 to 10.05 seconds.Work out the percentage change in speed

Mathematics

1 answer:

WARRIOR [948]3 years ago

7 0

I believe the answer is 1028%

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A particle starts at the point P=(−5,−1,3) when t=0 and moves along a straight line toward Q=(−6,−6,8) at a speed of 9 cm/sec. L

navik [9.2K]

Answer:

Step-by-step explanation:

Given

Particle moves from $P\ (-5,-1,3)\ to\ Q\ (-6,-6,8)$

speed of particle is $v=9\ cm/s$

Unit vector in the direction of vector $\vec{PQ}$ is given by

$\hat{n}=\frac{\vec{Q}-\vec{P}}{|\vec{Q}-\vec{P}|}$

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Parametric vector equation is given by

$x=\frac{-9t}{\sqrt{51}}$

$y=\frac{-45t}{\sqrt{51}}$

$z=\frac{45t}{\sqrt{51}}$

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Which of the following best describes the slope of the line below?

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ΔTOY has coordinates T (−3, 4), O (−4, 1), and Y (−2, 3). A translation maps point T to T' (−1, 1). Find the coordinates of O' a

Setler79 [48]

Given:
T (-3,4) ; O (-4,1) ; Y (-2,3)
T'(-1,1) ;

T
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4 move forward 3 points to reach 1

O
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1 move forward 3 points to reach -2

Y
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3 move forward 3 points to reach 0.

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3 years ago

Read 2 more answers