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Sophie [7]
4 years ago
5

HELP I NEED THIS ANSWERED AS FAST AS POSSIBLE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Physics
1 answer:
WITCHER [35]4 years ago
8 0

Displacement is d  


Vf² = Vi² + 2 g d  


(-20²) = (+10²) + 2 (-9.8) d  


-19.6 d = 300  


d = -15.3 m  


negative means lower


time is t  


d = Vi t + 1/2 g t²



-15.3 = 10 t + (-4.9) t²



4.9 t² - 10 t -15.3 = 0  


t = 3.06 s

Hope this helps -John

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Please help! Will give brainly, 50 points!! I don't understand! I just need this to give me a boost on my other questions.
harina [27]

Answer:

The answer to your question is: c = 353 mi/h; Ф = 7.3°

Explanation:

You can see the picture below

To solve this problem, just imagine a right rectangle which the legs is 350 mi/h and 45 mi/h and we are going to find the hypotenuse.

                    c² = a² + b²

                    c² = 350² + 45²

                   c² = 122500 + 2025

                   c² = 124525

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tanФ = 45/ 350

tan Ф = 0.12

Ф = 7.3°

8 0
4 years ago
An astronaut drops a hammer from 2.0 meters above the surface of the Moon. If the acceleration due to gravity on the Moon is 1.6
Elenna [48]

Answer:

option C

Explanation:

given,

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using equation of motion for the time calculation

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hence, the time taken by the hammer to reach the bottom is equal to 1.6 s.

The correct answer is option C

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