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3 years ago

Someone please help me for 7 points.... I don't know how to do this...

Physics

1 answer:

ololo11 [35]3 years ago

6 0

you need G, grav constant, here.

F=GMmoonMEllen/R^2

all other numbers given ... calculate ...

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A cannonball is fired from a cliff that is 50 meters above the ground. The cannonball is fired horizontally with a speed of 120

tankabanditka [31]

The horizontal distance that the cannonball will travel is 383.33m

In order to find the horizontal distance, we will use the formula for calculating the range expressed as:

$R = u\sqrt{\frac{2H}{g} }$ where:

u is the velocity

H is the height

g is the acceleration due to gravity

$R = 120\sqrt{\frac{2(50)}{9.8} }\\R = 120\sqrt{\frac{100}{9.8} } \\R=120\times 3.1943\\R=383.33m$

Hence the horizontal distance that the cannonball will travel is 383.33m

Learn more here: brainly.com/question/19028766

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2 years ago

An archer fish launches a droplet of water from the surface of a small lake at an angle of 70° above the horizontal. He is aimin

Norma-Jean [14]

Answer:

a). v=2776 m/s

Explanation:

The speed of the water droplet for the fish be successful is

Taking the distance in axis 'x' and 'y'

$x_{tx}=40cm\frac{1m}{100cm}=0.40m\\x_{ty}=23cm\frac{1m}{100cm}=0.23m$

The time is the velocity in axis 'x' with the angle 70 so

$t=\frac{0.40m}{v_{x}*cos(70)}$

Now using the time in terms of velocity the motion in axis 'y' can find the velocity to be the fish successful

$x_{yf}=x_{yo}+v_{o}*t+\frac{1}{2}*g*t^{2}\\0.23m=0.40m\frac{vo*sin(70)}{vo*cos(70)} +\frac{1}{2}*9.8*(\frac{0.40}{vo*cos(70)} )^{2}\\0.23m=0.40m*vo*tan(70)+4.9*(\frac{0.16m^{2} }{vo^{2} *cos(70)^{2} }) \\vo^{2}cos(70)^{2}=\frac{0.16m^{2} }{0.177}\\vo=\sqrt{\frac{0.9021}{cos(70)^{2}}} \\vo=2.776 \frac{m}{s}$

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3 years ago

What is general relativity

Katena32 [7]

Explanation:

General relativity is a theory of space and time. ... The central idea of general relativity is that space and time are two aspects of spacetime. Spacetime is curved when there is matter, energy, and momentum resulting in what we perceive as gravity. The links between these forces are shown in the Einstein field equations.

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3 years ago

Velocity of a car that travled 120 miles in 2 hours

Sophie [7]

60 Miles per hour 60 times 2 is 120

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3 years ago

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With a frequency of 500 hz, what is the period of a wave

Pavlova-9 [17]

<span>500 hz means 500 times in a second therefore its 2.</span>

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