Table of Contents

- 1 How do you calculate the power needed to move an object?
- 2 How do you calculate total energy J?
- 3 What is the power required formula?
- 4 What is the formula for efficiency?
- 5 What is the formula of 1 Joule?
- 6 What is work in physics class 9?
- 7 How is power defined?
- 8 How many joules does a generator use in 30 minutes?
- 9 How to calculate the kinetic energy of an object?

## How do you calculate the power needed to move an object?

Multiply mass times acceleration. The force (F) required to move an object of mass (m) with an acceleration (a) is given by the formula F = m x a. So, force = mass multiplied by acceleration.

### How do you calculate total energy J?

In classical mechanics, kinetic energy (KE) is equal to half of an object’s mass (1/2*m) multiplied by the velocity squared. For example, if a an object with a mass of 10 kg (m = 10 kg) is moving at a velocity of 5 meters per second (v = 5 m/s), the kinetic energy is equal to 125 Joules, or (1/2 * 10 kg) * 5 m/s2.

#### What is the power required formula?

In the International System of Units, the unit of power is the watt, equal to one joule per second. In older works, power is sometimes called activity. Power is a scalar quantity….Power (physics)

Power | |
---|---|

In SI base units | kg⋅m2⋅s−3 |

Derivations from other quantities | P = E/t P = F·v P = V·I P = τ·ω |

Dimension |

**How do you calculate power in thermodynamics?**

Power can be expressed as P = Work/Change in Time, instead of P = Change in Energy/Change in Time, because the change in energy is basically the work done.

**What is the formula for calculating acceleration?**

Acceleration (a) is the change in velocity (Δv) over the change in time (Δt), represented by the equation a = Δv/Δt.

## What is the formula for efficiency?

Efficiency is often measured as the ratio of useful output to total input, which can be expressed with the mathematical formula r=P/C, where P is the amount of useful output (“product”) produced per the amount C (“cost”) of resources consumed.

### What is the formula of 1 Joule?

Work (Joule)= F × D = [M1 L1 T-2] × [L1] = [M1 L2 T-2]. Therefore, Joule is dimensionally represented as [M1 L2 T-2].

#### What is work in physics class 9?

• Work done on an object is defined as the magnitude of the force multiplied by the distance moved by the object in the direction of the applied force. Work done = force × distance. = F × s.

**What is current formula?**

The current is the ratio of the potential difference and the resistance. It is represented as (I). The current formula is given as I = V/R. The SI unit of current is Ampere (Amp).

**How do you find power?**

Power is equal to work divided by time. In this example, P = 9000 J /60 s = 150 W .

## How is power defined?

1 : possession of control, authority, or influence over others. 2 : a nation that has influence among other nations a foreign power. 3 : the ability to act or produce an effect It’s in your power to change things. 4 : the right to do something the president’s powers. 5 : physical might : strength The wind grew in power …

### How many joules does a generator use in 30 minutes?

Assuming 100% running efficiency, how many joules does it use in that time?10 kilowatts is 10,000 watts, and 30 minutes is 30 x 60s = 1,800 seconds. Putting these figures into the calculator and clicking Calculate shows that the generator consumed 18,000,000 joules of energy.

#### How to calculate the kinetic energy of an object?

Kinetic Energy. In classical mechanics, kinetic energy (KE) is equal to half of an object’s mass (1/2*m) multiplied by the velocity squared. For example, if a an object with a mass of 10 kg (m = 10 kg) is moving at a velocity of 5 meters per second (v = 5 m/s), the kinetic energy is equal to 125 Joules, or (1/2 * 10 kg) * 5 m/s 2.

**How to calculate the potential energy of gravity?**

Where: PEg or PE = gravitational potential energy m = mass of an object g = acceleration due to gravity h = height of the object

**How much energy is needed to move a 1 kg object?**

How much energy is needed to move a 1 kg object for a distance of 1 meter horizontally in a constant speed (assuming no energy is wasted)? No more than m v 2 / 2. Does it matter what is the movement speed (assuming not zero)?