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Viktor [21]
3 years ago
8

6. What is the kinetic energy of the ball as it is half way through the fall?

Physics
1 answer:
bazaltina [42]3 years ago
6 0

Answer:Freedmen, and Abandoned Lands, usually referred to as simply the Freedmen's Bureau. Sowwy if i'm wrong

Explanation: During its years of operation, the Freedmen's Bureau fed millions of people, built hospitals and provided medical aid, negotiated labor contracts for ex-slaves and settled labor disputes. It also helped former slaves legalize marriages and locate lost relatives, and assisted black veterans.

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How high above the ground would a 10 kg object needs to be to have the same GPE as the 30 kg object in the example
Black_prince [1.1K]

Answer:

The 10 kg mass would have to be at a height 3 times that of the 30 kg mass to have the same gravitational potential energy as the 30 kg mass.

Explanation:

Gravitational potential energy, U = mgh where m = mass of object, g = acceleration due to gravity = 9.8 m/s² and h = height of object above the ground.

Now, let U' = gravitational potential energy of 10 kg mass = m'gh' where m' = 10 kg and h' = height of 10 kg mass above the ground.

So, U' = 10gh'

Also, let U" = gravitational potential energy of 30 kg mass = m"gh" where m" = 30 kg and h" = height of 30 kg mass above the ground.

So, U" = 30gh"

Since both object are supposed to have the same potential energy at a given height of the 10 kg mass,

U' = U"

10gh' = 30gh"

h' = 30gh"/10g

h' = 3h"

<u>So, the 10 kg mass would have to be at a height 3 times that of the 30 kg mass to have the same gravitational potential energy as the 30 kg mass.</u>

4 0
3 years ago
A toy train moves 40m in 20s at the constant velocity. What is the toy’s velocity? *<br> 1 point
stepladder [879]

Answer:

2 m/s

Explanation:

Velocity is a vector quantity that is given by:

v=\frac{d}{y}

where

d is the displacement of the object (a vector indicating its change in position)

t is the time elapsed

Note that since velocity is a vector, it has both a magnitude and a direction (the same as the displacement).

For the toy train in this problem, we have:

d = 40 m (displacement)

t = 20 s (time elapsed)

So, its velocity is:

v=\frac{40}{20}=2 m/s

7 0
3 years ago
Two charges with a certain distance apart have an electrostatic force of 400 N acting
Doss [256]
As the charges’ distance increase, there is a weaker force of attraction between them hence the electrostatic force decreases as distance increases. It increase by 4 (times 4) so the force will decrease by 4 making the answer

=A (400 divided by 4 = 100)
3 0
2 years ago
Why do buildings on permafrost have potential structural issues?
Veronika [31]
I believe that the answer to the question provided above is that the <span>buildings on permafrost have potential structural issues because the soil is not stable in this area.</span>
Hope my answer would be a great help for you.    If you have more questions feel free to ask here at Brainly.

8 0
3 years ago
Read 2 more answers
Does a physical change affect the identity of a substance? Does a chemical change affect the identity of a substance?
eduard
Yes or no because I don't know and im tired
3 0
4 years ago
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