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Vladimir [108]
3 years ago
5

A 5 kilogram block is dropped from a height of 3 meters and falls straight to the ground. What is the work done by the force of

gravity?
Physics
1 answer:
vazorg [7]3 years ago
5 0

Answer:

Workdone = 147Nm

Explanation:

Given the following data;

Mass = 5kg

Height = 3m

We know that acceleration due to gravity is 9.8m/s²

First of all, we would find the force applied;

Force = mass * acceleration

Force = 5*9.8

Force = 49N

Now, to find the workdone;

Workdone = force * distance

Substituting into the equation, we have;

Workdone = 49 * 3

Workdone = 147Nm

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A "spherical capacitor" is constructed of two thin, concentric spherical shells of conducting material. Let a be the radius of t
Shalnov [3]

Answer:

C=\frac{ab}{k(b-a)}

Explanation:

We can assume this problem as two concentric spherical metals with opposite charges.

We have also to take into account the formulas for the electric field and the capacitance. Hence we have

C=\frac{Q}{V}\\\\E=k\frac{Q}{r^2}\\

Where k is the Coulomb's constant. Furthermore, by taking into account the expression for the potential and by integrating

dV=Edr\\\\V=\int_{R_1}^{R_2}Edr=-\int_{R_1}^{R_2}\frac{kQ}{r^2}dr\\\\V=kQ[\frac{1}{R_2}-\frac{1}{R_1}]

Hence, the capacitance is

C=\frac{1}{k[\frac{1}{R_2}-\frac{1}{R_1}]}

but R1=a and R2=b

C=\frac{ab}{k(b-a)}

HOPE THIS HELPS!!

3 0
3 years ago
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A 0.5 kg basketball moving 5 m/s to the right collides with a 0.05 kg tennis
yulyashka [42]

Answer:

b

Explanation:b

4 0
2 years ago
calculate the temperature at which the reading on Fahrenheit scale is equal to half the reading of Celsius scale​
RideAnS [48]

Answer:

Therefore, the temperature at which the Fahrenheit scale reading is equal to half of the Celsius scale is −24.6∘C .

3 0
2 years ago
Nicole's office is 5 m wide and 3 m long. What is the area?
Sloan [31]
Area is calculated as length times width.
In this case, the width is 5 m and the length is 3 m.
5 • 3 = 15
So the area of Nicole's office is 15 square meters.
Square meters because only length and width is 2 dimensional.

Hope this helps!
6 0
3 years ago
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Light propagates faster through a medium “A” than medium “b”
Serhud [2]

Answer:

1) The medium b has higher optical density.

2) If the optical densities of both A and B are same.

Explanation:

  1. The refractive index of a material determines the number of times the velocity of light in that material is slower than the velocity of light in a vacuum.
  2. The higher refractive index means slower propagation of the light in that medium.
  3. The refractive index of the medium determines the optical density of the medium.
  4. If the material has a higher refractive index, then its optical density is high.
  5. If the material has a low refractive index, then its optical density is low.
  6. The light bends towards the normal while refracting through the medium from a lower optical density medium to the higher optical density medium.
  7. If both the mediums has the same optical density, the direction of propagation doesn't change.
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3 years ago
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