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vova2212 [387]
3 years ago
13

Please help me with this practice questions

Physics
1 answer:
Mnenie [13.5K]3 years ago
8 0
C They are equal and opposite
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Factors that influence Wellness
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Help, Fine, and Better.

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3 years ago
If you drop a rock off a cliff and it hits the ground 3 seconds later how tall is that cliff
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Answer:

Basic kinematics, negating drag and assuming ideal conditions, we use the equation:

d=vi*t+1/2*a*t^2

Since vi is 0 (we know this because you’re dropping it, not throwing it)…

…and the only acceleration acting on it is gravity, a=9.8 m/s^2…

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d=1/2(9.8)(5)^2

Explanation:

Some quick mental math tells us that this is about 125 m.

Plugging it in, we find it to be 122.5 m.

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3 years ago
A physicist found that a force of 1.32 N was measured between two charged spheres. The distance between the spheres was 95 cm. C
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The electric force (and the gravitational force too) is inversely proportional
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In this question, the distance is increased by a factor of  (1.25/0.95) .

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The new force is

           (1.32 N) · (0.95/1.25)²  =  0.762... newton   (rounded)
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3 years ago
Which of the following requires constant agonist-antagonist muscle contraction
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