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Kamila [148]
3 years ago
15

Railway tracks are laid on large sized wooden sleepers.give reason

Physics
2 answers:
vampirchik [111]3 years ago
6 0

Answer:

rgndorgnodgkdjgkj

Explanation:

vredina [299]3 years ago
5 0
Train tracks use electricity and wood is both safe and a perfect foundation to start the process of building tracks
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the angular speed of an automobile engine is increased at a constant rate from 1300rev/min to 2000rev/min in 3s (a) what is its
GalinKa [24]

Answer:

please find attached pdf

Explanation:

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8 0
2 years ago
REMARKS The speed found in part (a) is the same as if the woman fell vertically through a distance of 21.9 m. The result of part
sasho [114]

Answer:

Yes, if the system has friction, the final result is affected by the loss of energy.

Explanation:

The result that you are showing is the conservation of mechanical energy between two points in the upper one, the energy is only potential and the lower one is only kinetic.

In the case of some type of friction, the change in energy between the same points is equal to the work of the friction forces

    W_{fr} = ΔEm

    W_{fr} = Em_{f} -Em₀

As we can see now there is another quantity and for which the final energy is lower and therefore the final speed would be less than what you found in the case without friction.

    Em_{f} =W_{fr} + Em₀

 

Remember that the work of the rubbing force is negative, let's write the work of the rubbing force explicitly, to make it clearer

    ½ m v² = -fr d + mgh

    v = √(-fr d 2/m + 2 gh)

    v = √ (2gh - 2fr d/m)

Now it is clear that there is a decrease in the final body speed.

Consequently, if the system has friction, the final result is affected by the loss of energy.

5 0
3 years ago
A projectile is launched straight upwards at 75 m/s. Three seconds later, its velocity is...?
yawa3891 [41]

Answer:

V = V0 + a t

V = 75 - 9.8 * 3 = 45.6 m/s

4 0
3 years ago
Who may drive a vehicle in Texas?
nirvana33 [79]

Answer:

Yes

Explanation:

3 0
3 years ago
Read 2 more answers
Please help me with this​
Allushta [10]

Answer:

We define voltage as the amount of potential energy between two points on a circuit. One point has more charge than another. This difference in charge between the two points is called voltage.

3 0
2 years ago
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