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Leviafan [203]
2 years ago
6

Please please help I'm stuck!!!

Physics
2 answers:
alex41 [277]2 years ago
8 0
I GOTCHU THE ANSWER IS 2.44s
Korvikt [17]2 years ago
6 0

Answer: iDc im in 3grade

Explanation:sorry

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A ball is thrown horizontally from the top of a building 0.10 km high. The ball strikes the ground at a point 65 m horizontally
aivan3 [116]

Answer:

option B

Explanation:

given,

height of building = 0.1 km

ball strikes horizontally to ground at = 65 m    

speed at which the ball strike = ?

vertical velocity  = 0 m/s

time at which the ball strike

s = \dfrac{1}{2}gt^2

t = \sqrt{\dfrac{2s}{g}}

t = \sqrt{\dfrac{2\times 100}{9.8}}

t = 4.53 s

vertical velocity at the time  4.53 s = g × t = 9.8 × 4.53 = 44.39 m/s

horizontal velocity = \dfrac{65}{4.53} =14.35 m/s

speed of the ball = \sqrt{44.39^2+14.35^2}

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hence, the speed of the ball just before it strike the ground = 47 m/s

The correct answer is option B

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2 years ago
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What are the factors of evaporation and give explanation​
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7 0
3 years ago
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A wave oscillates 5.0 times a second and has a speed of 4.0m/s what is the frequency of this wave
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Answer:

The frequency of the wave is 5.0Hz

Explanation:

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