how to calculate how much energy is used physics?
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The formula for the energy of motion is KE = . 5 × m × v2 where KE is kinetic energy in joules, m is mass in kilograms and v is velocity in meters per second.
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Power = force times velocity. Friction force multiplied by the constant velocity tells you how much energy is 'lost' per second. If you know the length of the ramp, you can combine this with the constant velocity to find out how many seconds were spent in losing the amount of energy.
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To calculate the energy you will use over time, just multiply the power consumption by the hours of use. The 13W light fitting, on for 2 hours, will take 13 x 2 = 26Wh from the battery. Repeat this for all the appliances you wish to use, then add the results to establish total consumption.
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Multiply watts by seconds to get joules. A 1 Watt device consumes 1 Joule of energy every 1 second. If you multiply the number of watts by the number of seconds, you'll end up with joules. To find out how much energy a 60W light bulb consumes in 120 seconds, simply multiply (60 watts) x (120 seconds) = 7200 Joules.
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['Device Wattage (watts) x Hours Used Per Day = Watt-hours (Wh) per Day.', 'Device Usage (Wh) / 1000 (Wh/kWh) = Device Usage in kWh.', 'Daily Usage (kWh) x 30 (Days) = Approximate Monthly Usage (kWh/Month)']
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['Use a photometer to measure the energy of a wave.', 'Convert the energy into J s.', "Divide the energy by Planck's constant, 6.626 x 10-34, to get the frequency of the wave.", 'Divide the speed of light, ~300000000 m / s, by the frequency to get wavelength.']
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When calculating kinetic energy, you first square the velocity of each particle, multiply by the particles mass divided by two and then add.
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This implies, for instance, that 1 kilogram of matter is equivalent to an energy E = (1 kg)×(3×108 m/sec)2 = 9×1016 kg m2/sec2. An energy of 1 kg m2/sec2 is known as 1 joule, for short. The joule is not a unit of energy that is used much in everyday life.
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This implies, for instance, that 1 kilogram of matter is equivalent to an energy E = (1 kg)×(3×108 m/sec)2 = 9×1016 kg m2/sec2. An energy of 1 kg m2/sec2 is known as 1 joule, for short.
756258
You can determine the kinetic energy the "meteor" will have at the time of impact by using the equation KE = (1/2)mv^2 where KE stands for kinetic energy in Joules, m is the mass of the "meteor" in kilograms, and v is the velocity of the "meteor" in meters per second.
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Initial kinetic energy KE = 1/2 m1v12 + 1/2 m2v22 = joules. The following calculation expects you to enter a final velocity for mass m1 and then it calculates the final velocity of the other mass required to conserve momentum and calculates the kinetic energy either gained or lost to make possible such a collision.
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['Calculate the watts each device uses per day.', 'Convert watts to kilowatts. There are 1000 watts in one kilowatt.', 'Determine the kilowatts an appliance uses per month.', 'Figure out the cost. (Some multiplication required.)']
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An object's ability to do work is measured by its mechanical energy, or the sum the object's kinetic energy and potential energy. Mechanical energy is due to the position or movement of an object. The formula for mechanical energy is mechanical energy = kinetic energy + potential energy.
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The mechanical energy of an object is equal to the sum of the potential plus kinetic energies, i.e. E = PE + KE, and is a direct measure of the total energy available to an object as its speed and position changes from one point to another. mgh = 1/2 mv2.
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The formula for potential energy depends on the force acting on the two objects. For the gravitational force the formula is P.E. = mgh, where m is the mass in kilograms, g is the acceleration due to gravity (9.8 m / s2 at the surface of the earth) and h is the height in meters.
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Your electric bill is calculated by your energy usage (total watts used) multiplied by the electric rate for your home or business. Energy usage is measured in kilowatt hours (kWh). A kilowatt equals 1000 watts. A kilowatt hour equals 1000 watts for 1 hour.
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E = F * d * cos θ which in words states that the energy needed is equal to the product of the applied force and displacement along the direction of the force. Energy is directly proportional to the applied force which means that if the energy is doubled then the force will also be doubled.