2 years ago

When you Draw force diagrams when do you draw the components of gravity

Physics

1 answer:

xxTIMURxx [149]2 years ago

3 0

I think you always draw the gravity component. I'm not exactly sure though.

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Answer:

Average speed will be 48.23 km/h

Explanation:

Let the distance up to hill is = d km

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So time required $t=\frac{distance}{speed}=\frac{d}{38}hour$

Speed when car return from hill = 66 km/h

So time required to return fro hill $t=\frac{d}{66}h$

Total time $t_{total}=\frac{t}{38}+\frac{t}{66}$

Total distance = d+d =2d

So average speed $=\frac{total\ distance}{total\ time}=\frac{2d}{\frac{d}{38}+\frac{d}{66}}=48.23km/h$

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