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A child is on a playground they start to slide down a large slide. At what point is the child in dynamic equilibrium with the slide?(1 point)

Responses

When the child pushes themselves down the slides.
When the child pushes themselves down the slides.

As the child is in motion as they are sliding down.
As the child is in motion as they are sliding down.

When the slide ends and the child has stopped moving .
When the slide ends and the child has stopped moving .

The child will not reach dynamic equilibrium.

Which statement correctly defines dynamic equilibrium? (1 point)
Responses

Forces acting on a object are balanced and the object stays in rest.
Forces acting on a object are balanced and the object stays in rest.

Forces acting on a object are unbalanced and the object stays in rest.
Forces acting on a object are unbalanced and the object stays in rest.

Forces acting on a object are balanced and the object stays in motion.
Forces acting on a object are balanced and the object stays in motion.

Forces acting on a object are unbalanced and the object stays in motion.

While you push a box you begin to decrease the force you are exerting on the box. When will the box reach static equilibrium?(1 point)
Responses

When Fpush=Ffriction
When cap f sub p u s h is equal to cap f sub f r i c t i o n

When Fpush>Ffriction
When cap f sub p u s h is greater than cap f sub f r i c t i o n

When Fpush<Ffriction
When Fpush<Ffriction

The box will not reach static equilibrium.

What is the fastest motion that can be measured in any frame of reference? (1 point)
Responses

300,000 m/s
300,000 m/s

186,000 m/s
186,000 m/s

186,000 km/s
186,000 km/s

300,000 km/s

Two people are on a train that is moving at 10 m/s north. They are walking 1 m/s south relative to the train. Relative to the ground, their motion is 9 m/s north.

Why are we able to use these motions to describe the motion relative to the ground?

(1 point)
Responses

If one object is moving much slower than the speed of light, its speed can be added to that of another object.
If one object is moving much slower than the speed of light, its speed can be added to that of another object.

As long as the frame of reference is stationary, all motion can be described in this way.
As long as the frame of reference is stationary, all motion can be described in this way.

The people are moving much slower than the speed of light so the ground acts as a frame of reference.
The people are moving much slower than the speed of light so the ground acts as a frame of reference.

The motion of everything in the Universe besides light can be described in this way.
The motion of everything in the Universe besides light can be described in this way.

1 answer

Here are the answers to your questions:

  1. At what point is the child in dynamic equilibrium with the slide?

    • Answer: The child will not reach dynamic equilibrium.
    • Explanation: Dynamic equilibrium refers to a situation where an object is moving at a constant velocity and the net force acting on it is zero. In this case, since the child is sliding down the slide, they are experiencing a change in position and velocity.

  2. Which statement correctly defines dynamic equilibrium?

    • Answer: Forces acting on an object are balanced and the object stays in motion.
    • Explanation: Dynamic equilibrium occurs when an object moves at a constant velocity because the forces acting on it (like friction and gravity) are balanced.

  3. When will the box reach static equilibrium?

    • Answer: When Fpush = Ffriction
    • Explanation: Static equilibrium occurs when the net force acting on an object is zero, meaning the pushing force equals the frictional force, and the object remains at rest.

  4. What is the fastest motion that can be measured in any frame of reference?

    • Answer: 300,000 km/s
    • Explanation: The speed of light in a vacuum is approximately 300,000 kilometers per second, and it is often considered the maximum speed in the universe.

  5. Why are we able to use these motions to describe the motion relative to the ground?

    • Answer: If one object is moving much slower than the speed of light, its speed can be added to that of another object.
    • Explanation: In classical mechanics, when objects are moving at speeds much less than the speed of light, their velocities can be added in a straightforward manner to determine their relative motion from different frames of reference.

If you need additonal information or further clarification, feel free to ask!