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Y_Kistochka [10]
3 years ago
5

Need help with this question

Physics
1 answer:
Ainat [17]3 years ago
5 0
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Lord Beckett and members of the EIT Co. spot the Black Pearl in the distance making its way towards land. As a
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Answer:

Explanation:

The cannonball goes a horizontal  distance of 275 m . It travels a vertical distance of 100 m

Time taken to cover vertical distance =  t ,

Initial velocity u = 0

distance s = 100 m

acceleration a = 9.8 m /s²

s = ut + 1/2 g t²

100 = .5 x 9.8 x t²

t = 4.51 s

During this time it travels horizontally also uniformly so

horizontal velocity Vx = horizontal displacement / time

= 275 / 4.51 = 60.97 m /s

Vertical velocity Vy

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= 0 + 9.8 x 4.51

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Resultant velocity

V = √ ( 44.2² + 60.97² )

= √ ( 1953.64 + 3717.34 )

= 75.3 m /s

Angle with horizontal Ф

TanФ = Vy / Vx

= 44.2 / 60.97

= .725

Ф = 36⁰ .

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3 years ago
If scientists could bore though Earth's interior, what change would they most likely notice as they passed from the lithosphere
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A 0.10- kg ball is thrown straight up into the air with
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Answer:(a)0,(b)1.061 kg-m/s

Explanation:

Given

mass of ball is 0.10 kg

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final velocity =0

-\left ( 15\right )^2=-2\times 9.81\times s

s=\frac{15^2}{2\times 9.81}=11.467 m

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For halfway to maximum height

v^2-u^2=2as_0

where s_0=\frac{11.467}{2}

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v=10.61 m/s

Thus its momentum is

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Which of the following has the greatest power
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Answer:

D). Last option is the correct choice.

Explanation:

Thanks!

3 0
3 years ago
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