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dedylja [7]
3 years ago
5

A child on a playground swings through a total of 32 degrees. If the displacement is equal on each side of the equilibrium posit

ion, what is the amplitude of this vibration?
Physics
1 answer:
Black_prince [1.1K]3 years ago
4 0

Answer: A = y/cos32

That is the amplitude A in terms of the displacement y.

Explanation: Since the displacement in the question In the question is the same in both direction, it is a Simple Harmonic Motion problem. In s.h.m the amplitude of displacement A is related to the displacement itself y by this simple equation

y = A* cos(theta)

So, A = y/cos(theta)

A = y/cos32.

If the magnitude of the displacement y is given, you just substitute in.

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Complete question is;

Consider a bus traveling to the west (-x direction) begins to slow down as it approaches a traffic light. Which statement concerning its acceleration in the x direction is correct

a) The bus is decelerating and its acceleration is positive.

b) The bus is decelerating, and its acceleration is negative.

c) The acceleration is zero.

d) A statement cannot be made using the information given.

Answer:

Option A - bus is decelerating and acceleration is positive.

Explanation:

We are told that the bus is travelling in (negative x direction) and begins to slow down. Since the bus is slowing down, it means that the bus is undergoing a negative acceleration which is called deceleration.

Thus, the bus is decelerating.

Since it is moving in the negative x-axis, it means acceleration is now; -(-a) which gives +a.

Thus, bus is decelerating and acceleration is positive.

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3 years ago
If the forces on an object are greater than zero, the motion of an object will what?
natulia [17]

If the forces on an object are greater than zero,the object will definitely in the motion. This concept in accordance with law of inertia.

<h3>What is force?</h3>

Force is defined as the push or pulls applied to the body. Sometimes it is used to change the shape, size, and direction of the body.

Newton's law of inertia states that a body wants to continue its motion until the external force is not acted on it.

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To learn more about the force, refer to the link;

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3 0
2 years ago
An isotope of the element fluorine has 9 protons and 10 neutrons. What is the name of this isotope? fluorine-
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The name is fluorine-19.

Usually, in the names of isotopes, we say the name of the element followed the mass number (eg. Carbon-12). The mass number is the sum of the number of protons and neutrons of that atom. Electrons are not included since they're too light compared to protons and neutrons. 

Therefore, to find out the name of the isotope, we have to find the mass number. Add up 9 and 10, which makes 19, so, the answer is fluorine-19. 
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Answer:

It takes approximately 52 min to drive from San Jose to San Francisco.

Explanation:

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