PHYSICS MIDDLE SCHOOL

4 PointsA car of mass 1300 kg drives in a circle of radius 85 m. If the car has a speed
of 20 m/s, what is the centripetal force acting on the car?
O
A. 6118 N
O
B. 1300 N
O C. 7982 N
O D. 305.9 N
SUBMIT

Answers

Answer 1
Answer:

Answer:

6118N

Explanation:

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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 = (W)/(t).

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 D 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:

\fbox{\begin\np =\frac{{\Delta w}}{{\Delta t}}\end{minispace}}

Here, p is the power, \Delta w is the change in energy and \Delta t is the change in the time.

Therefore, the power is the rate at which work is accomplished, option D 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.

Calculate the gravitational potential energy of a 10kg box on the top shelf of a closet, 2m above the floor

Answers

Answer:

196 J

Explanation:

PE = mgh

PE = (10 kg) (9.8 m/s²) (2 m)

PE = 196 J

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