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Physics

2 answers:

lakkis [162]2 years ago

5 0

Answer:

1.39m

Explanation:

Vikentia [17]2 years ago

4 0

Steps:

Abbreviations:
T= Time
Vf = Final Velocity
Vo = Initial Velocity
Δx = Displacement (aka distance)
| … | = Absolute Value

Here is 1 Equation for Time
T= (Vf/a) - (Vo/a)

T= | (0/-9.81) - (2.78/-9.81) |
T = 0.283

Time up is the same as time down so multiply by 2.
0.283 * 2 = 0.57

Here is 1 Equation for Displacement
Δx = 0.5 * t^2 * a

Δx = | 0.5 * 0.57^2 * -9.81 |
Δx = 1.58

Answer:
Option C
1.58

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How long does it take light from a camera to travel to the face of someone standing 7 meters away?

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Speed is simply defined as the distance travelled per unit time. Mathematically, it is expressed as:

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With the above formula, we can obtain the time taken for the light to travel from the camera to someone standing 7 m away. This can be obtained as follow:

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