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ki77a [65]
3 years ago
12

If you run a complete loop around an outdoor track of length 400 m in 100 s, find your(a) average velocity and (b) average speed

. *
Physics
1 answer:
laila [671]3 years ago
5 0

Answer:

a) 0 m/s

b) 4 m/s

Explanation:

The average velocity would end up being 0 because it is displacement over time and the displacement here is 0. However, speed is total distance over time which here is 400/100 so it is 4.

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The two possible angles obtained by using the qudratic equation are;

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s_{x} = (v_{A}) _x_{} } t

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t = 0.64 / cosθ

For the motion in y direction, an equation can be obtained as follows:

s_{y} = (v_{A})_{y}  t +\frac{1}{2} (a_{y} )t^{2}

s_{y} = (-v_{A}sinθ) }  t +\frac{1}{2} (a_{y} )t^{2}

Plugging in the values we get:

-20 = (-50_sinθ) }  t +\frac{1}{2} (-32.2} )t^{2}

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Therefore,

tanθ_{1} = 0.27

θ_{1} = 15.10°

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θ_{2} = 73.51

Learn more about quadratic equation here:

brainly.com/question/17177510

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