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kupik [55]
3 years ago
12

2. -/1 pointsSerPSE10 2.7.P.017.MI.

Physics
1 answer:
Akimi4 [234]3 years ago
8 0
Answer: -7.86cm/s^2 don’t forget negative sign!

v1=14cm/s
dx=2.97-(-5)=7.97cm
t=2.85s

dx= v1*t+1/2at^2

I’m not writing the unit’s into the equation until the end, but you always should include them in all your calculations!! Units are very important and helpful to solve problems! Anyways, here we go;

7.97=(14*2.85)+1/2a(2.85)^2

a=[(7.97)-(14*2.85)]*2/(2.85)^2

a=(-63.86)/(8.1225)

a=-7.86cm/s^2 don’t forget the negative sign!

Any questions please feel free to ask. Thanks.


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Answer:

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Explanation:

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For this we use Newton's second law, where we create a reference frame with the horizontal x axis

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         F_{y} = F_{1y} + F_{2y} + F_{3y}

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b) in the form of module and angle

we use the Pythagorean theorem

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