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Sauron [17]
3 years ago
5

Explain how rock D is the best rock

Physics
1 answer:
Naya [18.7K]3 years ago
7 0
The best rock is D because it is big and heavy out of all of them. Rock A would fling too far because it is the lightest of all rocks as shown.

 B and C would probably fling through the target because it is just the right size. 

Besides, Depending on their weight of each rock, rock D is heavy because it is big. Rock A is too light to fling or land on the target. This is my hypothesis.

I don't really get how would rock D be the best one, but upon your question, this is all i know. 

Thank you for posting your question, hope this helps, have a great day. please mark brainliest so i can answer more of your questions. 
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3 years ago
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Vector ????⃗ has a magnitude of 16.6 and is at an angle of 50.5∘ counterclockwise from the +x‑axis. Vector ????⃗ has a magnitude
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Answer:

For vector u, x component = 10.558 and  y component =12.808

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For vector v, x component = 23.6316 and y component = -6.464

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Explanation:

Let the vector u has magnitude 16.6

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So u_x=ucos\Theta =16.6\times cos50.5=10.558

Vertical component u_y=usin\Theta =16.6\times sin50.5=12.808

So vector u will be u = 10.558 i+12.808 j

Unit vector u=\frac{10.558i+12.808j}{\sqrt{10.558^2+12.808^2}}=0.636i+0.7716j

Now in second case let vector v has a magnitude of 24.5

Making an angle with -15.3° from x axis

So horizontal component v_x=vcos\Theta =24.5\times cos(-15.3)=23.6316

Vertical component v_y=vsin\Theta =24.5\times sin(-15.3)=-6.464

So vector v will be 23.6316 i - 6.464 j

Unit vector of v =\frac{23.6316i-6.464}{\sqrt{23.6316^2+6.464^2}}=0.9645i-0.2638j

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Answer:

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The si base unit for length is the
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The meter is the S.I.unit for length. 
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