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Anni [7]
3 years ago
7

A girl is shown at position A on a swing when the seat is directly below the support bar. The seat is then at height A as shown

by a grey arrow and grey line. When she swings up and to the right to position B when the seat is at height B as shown by a grey arrow and grey line. At which position, A or B, is the potential energy of the swing the greatest? As the swing moves from point B to point A, which form of energy is increasing, kinetic or potential?
Physics
2 answers:
soldier1979 [14.2K]3 years ago
9 0

Answer:

1st one is B and 2nd one is kinetic i take the quiz

Explanation:

MrRa [10]3 years ago
7 0

Answer:

<u></u>

  • <u>1. The potential energy of the swing is the greatest at the position B.</u>

  • <u>2. As the swing moves from point B to point A, the kinetic energy is increasing.</u>

Explanation:

Even though the syntax of the text is not completely clear, likely because it accompanies a drawing that is not included, it results clear that the posittion A is where the seat is at the lowest position, and the position B is upper.

The gravitational <em>potential energy </em>is directly proportional to the height of the objects with respect to some reference altitude. Thus, when the seat is at the position A the swing has the smallest potential energy and when the seat is at the <em>position B the swing has the greatest potential energy.</em>

Regarding the forms of energy, as the swing moves from point B to point A, it is going downward, gaining kinetic energy (speed) at the expense of the potential energy (losing altitude). When the seat passes by the position A, the kinetic energy is maximum and the potential energy is miminum. Then the seat starts to gain altitude again, losing the kinetic energy and gaining potential energy, up to it gets to the other end,

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Answer:

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Explanation:

It is given that,

Pressure exerted by the four tires of an automobile, P=2.2\times 10^5\ Pa

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Area of 4 tires,  A=0.092\ m^2

We know that the pressure exerted by an object is equal to the force per unit area. Its formula is given by :

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3 years ago
With the switch open, roughly what must be the resistance of the resistor on the right for the current out of the battery to be
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Answer:

The resistance must be 6.67\Omega

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For the current to be the same when the switch is open or closed, the resistances must be connected in parallel as current is distributed in parallel with the same voltage across the circuit:

Thus in parallel:

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Answer:

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Explanation:

The following data were obtained from the question:

Force (F) = 5×10¯⁶ N

Charge 1 (q₁) = 6.7×10¯⁹ C

Charge 2 (q₂) = 6.7×10¯⁹ C

Electrical constant (K) = 9×10⁹ Nm²C¯²

Distance apart (r) =?

Thus, the distance between the two charges can be obtained as follow:

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