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Force = Mass × Acceleration (F = m × a)
Kinetic Energy = ½ × Mass × Velocity² (KE = ½mv²)
Power = Work / Time (P = W / t)
Understanding the fundamental concepts of physics
Force is any interaction that, when unopposed, will change the motion of an object. In physics, force is defined as the rate of change of momentum with respect to time.
The SI unit of force is the Newton (N), named after Sir Isaac Newton. One Newton is defined as the force needed to accelerate one kilogram of mass at the rate of one meter per second squared.
Where F is force, m is mass, and a is acceleration.
Energy is the quantitative property that must be transferred to an object in order to perform work on, or to heat, the object. Energy is a conserved quantity; the law of conservation of energy states that energy can be converted in form, but not created or destroyed.
The SI unit of energy is the Joule (J). Common forms of energy include kinetic energy, potential energy, thermal energy, and chemical energy.
Where m is mass, v is velocity, g is gravitational acceleration (9.8 m/s²), and h is height.
Power is the rate at which work is done or energy is transferred. It is the amount of energy consumed per unit time. The more powerful a device is, the more energy it can transfer in a given amount of time.
The SI unit of power is the Watt (W), named after James Watt. One watt is equal to one joule per second.
Where P is power, W is work, and t is time.
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Find answers to common questions about force, energy, and power calculations
Force is a push or pull on an object that can cause it to accelerate, while energy is the capacity to do work. Force is measured in Newtons (N), while energy is measured in Joules (J). Force can transfer energy to an object, but they are distinct physical concepts.
Power is the rate at which energy is transferred or converted. It measures how quickly work is done or energy is used. The relationship is expressed as Power = Energy / Time. For example, a 100W light bulb uses 100 Joules of energy every second.
The formula for kinetic energy is KE = ½ × m × v², where m is the mass of the object and v is its velocity. This formula shows that kinetic energy increases with the square of velocity, meaning that doubling an object's speed quadruples its kinetic energy.
Gravitational potential energy is calculated using the formula PE = m × g × h, where m is mass, g is the acceleration due to gravity (approximately 9.8 m/s² on Earth), and h is the height above a reference point. This energy represents the work done to lift an object against gravity.
Yes, our calculators are perfect for students working on physics assignments. They provide accurate results and can help you check your work. However, we recommend understanding the underlying concepts and formulas rather than just relying on the calculator for learning purposes.
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