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3241004551 [841]
3 years ago
8

Jill is pushing a box across the floor. Which represents the upward force perpendicular to the floor?

Physics
2 answers:
tensa zangetsu [6.8K]3 years ago
5 0

Answer:

c fn

Explanation:

the answer is c.....

iragen [17]3 years ago
5 0

Answer: C: Fn

Explanation:

I got it right on the edgenuity quiz

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A little boy is standing at the edge of a cliff 1000 m high. He throws a ball straight downward at an initial speed of 20 m/s, a
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Explanation:

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y(t) = \ y_0 \ + \ v_0 \ t \ + \frac{1}{2} \ a \ t^2.

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y_0 \ = \ 1000 m.

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take into consideration the minus sign, that appears cause the ball its thrown down.  The same minus appears for the acceleration:

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So, the equation for our problem its:

y(t) = \ 1000 m \ - \ 20 \ \frac{m}{s} \ t \ - \frac{1}{2} \ 10 \frac{m}{s^2} \ t^2.

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y(6 \ s) = \ 1000 m \ - \ 20 \ \frac{m}{s} \ * \ 6 \ s \ - \frac{1}{2} \ 10 \frac{m}{s^2} \ * \ (6 s)^2.

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y(6 \ s) = \ 1000 m \ - 120 m - 180 m.

y(6 \ s) = \ 1000 m \ - 300 m.

y(6 \ s) = \ 700 m.

So this its the height of the ball 6 seconds after being thrown.

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