Name the two components that make orbital motion, and explain why objects stay in orbit.
1 answer:
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An athlete produced 840 watts of power in 0.6 seconds. And will produce 504 joule of work did this individual perform during the exercise.
<u>Solution:</u>
we know that power is the work done completed in a given interval of time.
Power =
also, Work = Power × Time
Work = 840 × 0.6 = 504 joule
What is Power?
- The quantity of work that can be accomplished in a certain amount of time is measured by power.
- Power is expressed in joules per second (J/s) this is because work is denoted by the symbol J and time by the symbol s.
- This is the watt, which is also known as the power unit in SI (W). One joule of labor per second is equal to one watt.
- The number of watts that a device uses is indicated on labels for lightbulbs and other small appliances like microwaves.
- A force must be applied in order for work to be completed, and there must also be motion or displacement in the force's direction.
- The amount of force multiplied by the distance moved in the force's direction is known as the work done by a force acting on an item. Work has no direction and only magnitude. Work is a scalar quantity as a result.
Know more about work power numerical brainly.com/question/181496
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Answer:
C. Your mass is very small compared to Earth's mass.
Explanation:
Newton's third law of motion states that:
"When an object A exerts a force (action force) on an object B, object B exerts an equal and opposite force (reaction force) on object A".
If we apply this law to the situation described in the problem, we see that:
- The action force is the gravitational force exerted by the Earth on you
- The reaction force is the gravitational force exerted by you on the Earth
And according to the 3rd law, the magnitude of the two forces is equal:
(1)
We also know that, according to Newton's second law of motion, the force on an object is equal to the product between its mass (m) and its acceleration (a):
So we can rewrite (1) as
where
m is the your mass
a is your acceleration
M is the Earth's mass
A is the Earth's acceleration
For the term on the left, we see that m is small, so a is larger (therefore, your acceleration is visible). However, for the term on the right, we see that the mass of the Earth is very large (M is very large), therefore, A is very small, which means that the acceleration of the Earth is almost negligible because the Earth's mass is very large.
Answer:
The answer is at x = 0, which represents position B
Explanation:
The full question is:
"A block is attached to a horizontal spring and set in a
simple harmonic motion, as shown from above in the figure. When the spring is relaxed, the block is a position B, where the displacement x from the equilibrium position is 0. Letting D represent the maximum displacement, the extremes of the block's motion are at position A, where x= -D, and at position C, where x= D.
At what point in the motion is the speed of the block at its maximum?"
And you can see the figure on the attached file.
Simple Harmonic motion equations
We can start from the equation that describes the position that is
Here D stands for the amplitude which is the maximum displacement, and is the angular velocity, thus we can find the derivative to find the velocity equation, so we get
And we can find the derivative again to find the acceleration.
Maximum speed
We reach the maximum speed when the acceleration equation is equal to 0,
Thus it happens when
So if we replace that on the position equation we get
Thus the position where the speed of the block is at at its maximum is when it is going back to the origin, that is x = 0, so point b.
