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REY [17]
3 years ago
9

A tennis ball is dropped from a height of 1.21m above the ground. Calculate its velocity when it is 0.27m from the ground.

Physics
1 answer:
wlad13 [49]3 years ago
8 0
9.81m/s^2 x .27 = 2.6487m/s
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S Consider a ring of radius R with the total charge Q spread uniformly over its perimeter. What is the potential difference betw
WITCHER [35]

There the potential difference is -0. 553 keQ/R.

What is Electric potential ?

The amount of labor required to convey a unit of electric charge from a reference point to a given place in an electric field is known as the electric potential (also known as the electric field potential, potential drop, or the electrostatic potential).

Electric potential at point 0,

V1 = ke Q/R

Electric potential at x= 2R

V2= keQ/ root5. R

Therefore potential difference is

dV = V2 - V1

Putting the values we get ,

dV = -0. 553 keQ/R

To learn more about electric potential click on the link below:

brainly.com/question/23980243

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6 0
1 year ago
What is power, and what is its relationship to voltage and amperage? (4 points)
tigry1 [53]

Answer:

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Explanation: brainliest pls

5 0
4 years ago
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At an amusement park there is a ride in which cylindrically shaped chambers spin around a central axis. People sit in seats faci
olasank [31]

Answer:

r = 2.93 m

Explanation:

mass of the person = 64.8 kg

speed v = 3.44 m/s                  

Force F = 261 N

using formula                        

F = \dfrac{mv^2}{r}

the radius of the chamber is given by

r = \dfrac{mv^2}{F}                  

r = \dfrac{64.8\times 3.44^2}{261}

r = 2.93 m                                      

so, the radius of a chamber is equal to 2.93 m

6 0
3 years ago
A bungee cord with a spring constant of 800 stretches 6 meters at its greatest displacement. How much elastic potential energy d
Vinil7 [7]

Elastic potential energy is given by formula

U = \frac{1}{2} kx^2

here we know that

k = 800 N/m

x = 6 m

Now using above formula we have

U = \frac{1}{2}(800)(6^2)

U = 14400 J

So elastic potential energy in the chord is 14400 J

4 0
4 years ago
Assume that it takes 7.00 minutes to fill a 30.0-gal gasoline tank.
AnnyKZ [126]
A)0.0714 a second (7*60)/(30*60)=4.284    4.284/60=0.0714


4 0
3 years ago
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