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Dovator [93]
3 years ago
6

Two force vectors point in opposite directions. If their magnitudes are 3.53 newtons and 7.29 newtons, then what is the magnitud

e of their sum?
Physics
1 answer:
leonid [27]3 years ago
7 0

Answer:

3.76 N

Explanation:

We are given that two force vectors point in opposite directions.

Let

\mid F_1\mid=7.29N

\mid F_2\mid=-3.53

Because second force act in opposite direction.

We have to find the magnitude of sum of two forces.

We know that triangle law of addition

Resultant sum=\mid F_1\mid+\mid F_2\mid

Substitute the values then we get

Resultant sum of two forces=7.29-3.53

Resultant sum of two forces=3.76 N

Hence, the magnitude of sum of two forces=3.76 N

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3 years ago
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A toy rocket, launched from the ground, rises vertically with an acceleration of 28 m/s 2 for 9.7 s until its motor stops. Disre
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Answer:

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Explanation:

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v_1=v_{01}+a_1t

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We calculate then the height achieved in part 1:

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v_1=(0m/s)+(28m/s^2)(9.7s)=271.6m/s

We do the same for part 2, but now we must consider that the initial height is the one achieved in part 1 (y_{02}=1317.26m) and its initial velocity is the one achieved in part 1 (v_{02}=271.6m/s), now in free fall, which means with a downwards acceleration a_{2}=-9,8m/s^2. For the data we have it's faster to use the formula v_f^2=v_0^2+2ad, where d will be the displacement, or difference between maximum height and starting height of part 2, and the final velocity at maximum height we know must be 0m/s, so we have:

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3 0
3 years ago
If a topographic map included a 6,000 ft. mountain next to an area of low hills, which would best describe the contour lines on
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The answer to the given question above would be option B. If a topographic map included a 6,000 ft. mountain next to an area of low hills, the statement that best describe the contour lines on the map is this: <span>The contour lines around the mountain would be very close together. Hope this helps.</span>
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Can someone help asap with this
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Answer:

B

Explanation:

i had a test on this and got it correct

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