What is SI unit of Joule?
What is SI unit of Joule?
Joule, unit of work or energy in the International System of Units (SI); it is equal to the work done by a force of one newton acting through one metre. Named in honour of the English physicist James Prescott Joule, it equals 107 ergs, or approximately 0.7377 foot-pounds.
How many joules are in a Watt?
1 Watt-hour is equal to 3600 Joules (3.6kJ). One Kilowatt-Hour is the same as 1,000 Watt-hours and is the most common unit used in electrical energy consumption.
How many volts are in a Joule?
1 Electron Volt: Change in energy by moving a single electron across an electric potential difference of one volt. 1 Electron volt (eV) = 1.602176565 x 10-19 joules (J).
How do you determine velocity?
In order to find the velocity of the moving object, you will need to divide the change in position by the change in time. Specify the direction moved, and you have the average velocity.
How many joules does it take to move a car?
Ek = ½ x 10 kg x (20 m/s)2 = 2000 Joules When moving objects be stopped, all their kinetic energy must be transformed into another form of energy. Work done to stop object = kinetic energy lost. A car moving at 100 km/h has 4 times as much kinetic energy as a car moving at 50 km/h.
What is the formula of work?
The work is calculated by multiplying the force by the amount of movement of an object (W = F * d). A force of 10 newtons, that moves an object 3 meters, does 30 n-m of work. A newton-meter is the same thing as a joule, so the units for work are the same as those for energy – joules.