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kondor19780726 [428]
3 years ago
7

A train travels 76 kilometers in 2 hours and then 54 kilometers in 5 hours .What is the average speed ?

Physics
1 answer:
gizmo_the_mogwai [7]3 years ago
7 0
V = d ÷ t --> bc d=vt
V = (76+54)÷(2+5) = 130÷7 = 18.57km/hr
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Answer:

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Explanation:

Given:

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Above expression describes spacecraft's velocity vector v.

Find:

Find unit vector in the direction of spacecraft velocity v.

Solution:

Step 1: Compute magnitude of velocity vector.

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Step 2: Compute unit vector unit (v)

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                            unit (v) = [ -23.2 i -104.4 j + 46.4 k ] / 116.58

                            unit (v) = [ -0.199 i - 0.8955 j + 0.39801 k ]

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Explanation:

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