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olga55 [171]
3 years ago
5

A 200-kg boulder has 39,200 joules of gravitational potential energy. What height is it at?

Physics
1 answer:
ruslelena [56]3 years ago
6 0

Answer:

20 m

Explanation:

P.E=mgh

h=P.E/mg

h=39200/(200*9.8)

h= 20 meters.

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Explanation:

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3 years ago
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Turning a corner at a typical large intersection in a city means driving your car through a circular arc with a radius of about
Naddik [55]

Answer:

9.89 m/s.

Explanation:

Given that,

The radius of the circular arc, r = 25 m

The acceleration of the vehicle is 0.40 times the free-fall acceleration i.e.,a = 0.4(9.8) = 3.92 m/s²

Let v is the maximum speed at which you should drive through this turn. It can be solved as follows :

a=\dfrac{v^2}{r}\\\\v=\sqrt{ar} \\\\v=\sqrt{3.92\times 25} \\\\=9.89 m/s

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8 0
3 years ago
A spherical raindrop 2.5 mm in diameter falls through a vertical distance of 3900 m. Take the cross-sectional area of a raindrop
Karolina [17]

Answer:

276.62 m/s

Explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

a = Acceleration due to gravity = 9.81 m/s² (positive downward and negative upward)

Equation of motion

v^2-u^2=2as\\\Rightarrow v=\sqrt{2as+u^2}\\\Rightarrow v=\sqrt{2\times 9.81\times 3900+0^2}\\\Rightarrow v=276.62\ m/s

<u>Neglecting air drag</u> the velocity of the spherical drop would be 276.62 m/s

5 0
4 years ago
14
romanna [79]

Answer: 0.00068 N

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Force=Gm1m2/(r^2)

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Force=0.00068 N

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HELP 10 POINTS <br> Which set of balloons would exhibit a greater electric force and why?
vovikov84 [41]

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The second one because there is less <em><u>distance between them.</u></em>

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