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4 years ago

13

Question 1

1 answer:

wlad13 [49]4 years ago

7 0

You can draw vertical line, and get 2 rectangles.
1) First one with sides 2 and 7.
2) Second one with sides 1 and (5-2) = 3, 1 and 3.

3) Area of the first one =2*7=14 units²
4)Area of the second one = 1*3=3 units²

5) Area of the whole polygon = 14+3=17 units²

Answer C. 17units².

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3 years ago

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A body of mass 10kg at rest is subjected force of 16N. Find the kinetic energy at end of 20s.

777dan777 [17]

===================================

$\large \sf \underline{Problem:}$

A body of mass 10kg at rest is subjected force of 16N. Find the kinetic energy at end of 20s.

===================================

$\large \sf \underline{Answer:}$

$\huge \qquad \quad \sf{5,120 \: Joules}$

===================================

$\large \sf \underline{Solution:}$

<em>Firstly</em>, find the acceleration:

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<em>Secondly,</em> the velocity after 20 seconds will be:

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$\sf \pmb{V =32m/s}$

<em>Lastly</em>, find the kinetic energy:

$\sf{K=1/2mv^2}$
$\sf{K=1/2(10)(32)^2}$
$\sf{K=5(1024)}$
$\sf{\underline{\underline{\pmb{K=5120\:J}}}}$

Hence, the kinetic energy at the end is 5,120 Joules.

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3 years ago

Read 2 more answers

Which of the following pairs are equivalent to the fraction 1/5?

Amanda [17]

Answer:

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Step-by-step explanation:

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1/5 = (1×3)/(5×3) = 3/15

You can form many more equivalent forms

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4 years ago