# How would one label power? Is it in Newtons?

• scienceiscool
In summary: The car is not accelerating, so the total force on it must be zero, meaning the normal reaction force must equal the weight force.In summary, Power can be measured in Watts, which is equivalent to Joules per second or Newton metres per second. When a car is balanced on a hill, the two forces acting upon it are gravity (the weight force) and the normal reaction force from the ground. In this situation, the normal reaction force is equal to the weight force, resulting in a total force of zero and no acceleration.

#### scienceiscool

How would one label power? Is it in Newtons? And also, if a car is balanced on a hill, what are two of the forces that are acting upon it. I have gravity of course, but does inertia also work? Thanks in advance!

scienceiscool said:
How would one label power? Is it in Newtons? And also, if a car is balanced on a hill, what are two of the forces that are acting upon it. I have gravity of course, but does inertia also work? Thanks in advance!

How do you call the force of this hill on the car?

about power: recover the units yourself knowing that power is work per unit time and work is force times distance.

balanced forces? j/s or Watts?

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scienceiscool said:
How would one label power? Is it in Newtons?

It's in Watts.

1 Watt = 1 Joule per second = 1 Newton metre per second.

And also, if a car is balanced on a hill, what are two of the forces that are acting upon it.

There's the force of the Earth pulling down on the car (i.e. gravity, or the weight force), and the force of the ground pushing up on the car (usually called the "normal reaction force").

## 1. How is power defined in physics?

Power is defined as the rate at which work is done or energy is transferred. It is measured in watts (W) or joules per second (J/s).

## 2. Can power be measured in Newtons?

No, power cannot be measured in Newtons. Newtons are a unit of force, while power is a unit of energy per unit time. However, power can be calculated using force and velocity, as in the equation P = F * v.

## 3. Is power the same as strength?

No, power and strength are two different concepts. Power is the rate at which work is done, while strength is the amount of force a body can exert. For example, a lightweight athlete can have more power than a heavier athlete, but the heavier athlete may have more strength.

## 4. How do you measure power in an experiment?

Power can be measured using a device called a power meter, which measures the amount of energy being used or transferred per unit time. It can also be calculated using the equation P = W/t, where W is work and t is time.

## 5. Is power a scalar or vector quantity?

Power is a scalar quantity, as it only has magnitude and no direction. This is because it is a measure of how much work or energy is being used or transferred, rather than the direction in which it is being applied.