How is power defined?A.the quantity of work accomplished
B.the direction of the work
C.the total distance an object is moved
D.the rate at which work is accomplished
Please Help
Answers
The correct answer to this question is D) The rate at which work is accomplished.
EXPLANATION:
Let us consider a body performs W amount of work due to the application of some external forces.
Let the body does that work during the time interval of t seconds.
Hence, the power of the body is defined as the rate of doing work or the work done per unit time. We know that energy is the capacity to do work. So, power can be defined as the rate of consumption of energy.
Mathematically power can be written as -
Power P = .
Hence, the correct definition of power is that the rate at which work is accomplished.
The power is the rate at which work is accomplished, option is correct.
Further Explanation:
The power is the rate of transformation energy which is used by another body.
The power is the quantity with only magnitude so it is a scalar quantity. The standard of international unit is watt, it is also written as J/s. The standard of international unit watt in honor of James Watt.
A quantity is said as a vector if it has some magnitude and direction in order to give the details regarding the quantity.
A quantity is said as a scalar if it has only the magnitude in order to give the details regarding the quantity.
Concept:
The term power is defined as “The rate at which the work is finished or the energy is transferred from one place to another or transformed into another form.”
The term energy is defined as the capacity to do work or result in some displacement by applying some force.
The expression for power is:
Here, is the power,
is the change in energy and
is the change in the time.
Therefore, the power is the rate at which work is accomplished, option is correct.
Learn more:
1. Work and power brainly.com/question/9566221
2. Calculate power brainly.com/question/2829572
3. Energy and SI unit https://brainly.in/question/1227001
Answer Details:
Grade: Middle school
Subject: Physics
Chapter: Kinematics
Keywords:
Define, power, quantity, work, accomplished, direction, total distance, object, moved, rate, option, D.
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time. is the answer.
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The question is about Distance and Displacement. Distance, a scalar quantity, represents the total path length traveled between two positions, whereas displacement, a vector quantity, refers to the change in position from the starting to the final point, including direction.
When comparing distance and displacement in the field of science, specifically physics, there are key differences to keep in mind. Distance is a scalar quantity that refers to the total length of the path traveled between two positions. In contrast, displacement is a vector quantity—and thus includes both magnitude and direction—that represents the change in position of an object from its starting point to its end point.
Let's consider an example where you drive from home to school which is 5 km away, then return back home. In this case, the distance you traveled is 10 km because distance simply adds up all the lengths covered. However, the displacement is 0 km because displacement considers the direct path from the starting position to the final position; since you returned home, your initial and final positions are identical, and so the change in position is null.
Therefore, it's important to note that while distance and displacement can sometimes share the same magnitude, they are distinct in that displacement always includes direction. Distance is just a measure of how far an object has travelled, while displacement tells you how far and in which direction it is from the starting point.
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Distance is a scalar quantity that refers to "how much ground an object has covered" during its motion. Displacement is a vector quantity that refers to "how far out of place an object is"; it is the object's overall change in position.
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The lithosphere is made up of the Earth's crust and the upper part of the mantle. It is responsible for the formation of landforms like mountains and plateaus.
Explanation:
The lithosphere is made up of the Earth's crust and the upper part of the mantle. The Earth's crust is divided into several tectonic plates that float on the semi-fluid asthenosphere underneath. This rigid lithosphere is responsible for the formation of landforms like mountains, valleys, and plateaus.
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When attempting to increase the distance traveled by a projectile, what must occur
Answers
Energy or power has to be increased to increase the distance travelled by the projectile.
Explanation:
Projectile motion is defined as when an object is thrown or projected at a particular angle and it reaches the ground after sometime due to acceleration and gravity.
For example, throwing a ball in air. To increase the distance travelled by the object due to projectile motion, one must increase the power at which the object to set.
To increase the distance of a projectile you must increase the power behind the projectile. However you must also change the angle if you are aiming for a specific point. By increasing the power the momentum transfers to the object and the projectile gains more velocity and more distance. Also remember that energy transfers. For more distance you must have more velocity.