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Solve the following: 1. Calculate the work done in pushing a box with 150 N through a distance of 5 m. (Ans. 750 J) 2. A boy weighing 75 N jumps up and gains 300 J of gravitational potential energy. Find the height to which the boy will rise. (Ans. 4 m) 3. A 5 … Read more
A machine is efficient when most of the input energy is converted into useful output energy, with minimal energy lost as heat or friction. Related Questions: A car is moving with a constant speed along a straight road. Is there any work done on the car? Does the work done in raising a box up … Read more
Gravitational potential energy decreases when an object is taken from Earth to the Moon because the Moon’s gravitational pull is weaker than Earth’s. Related Questions: A car is moving with a constant speed along a straight road. Is there any work done on the car? Does the work done in raising a box up in … Read more
A ball bounces lower after each bounce because some of its energy is converted into heat, sound, and deformation, so less energy remains to propel it upwards. Related Questions: A car is moving with a constant speed along a straight road. Is there any work done on the car? Does the work done in raising … Read more
The work-energy theorem states that the work done on an object is equal to the change in its kinetic energy, meaning work either increases or decreases an object’s speed. Related Questions: A car is moving with a constant speed along a straight road. Is there any work done on the car? Does the work done … Read more
Work is done when the person lifts the book because force is applied to move the book over a distance against gravity. Related Questions: A car is moving with a constant speed along a straight road. Is there any work done on the car? Does the work done in raising a box up in a … Read more
To explain the energy flow through steady-state systems such as a filament lamp, a power station, and a vehicle traveling at a constant speed on a level road, I will provide a verbal description of the energy conversions and then illustrate the energy flow diagrams. 1. Filament Lamp (Light Bulb) A filament lamp is an … Read more
Efficiency is a measure of how well a machine or system converts the input energy or work into useful output energy or work. It is the ratio of useful energy output to the total energy input, usually expressed as a percentage. Mathematically, efficiency (η\etaη) is given by the formula: η=Useful energy output/Total energy input×100 Importance … Read more
Power is defined as the rate at which work is done or the rate at which energy is transferred or converted. It measures how quickly energy is used or produced. In simpler terms, power tells us how fast a task is being completed in terms of energy. Mathematically, power can be expressed as: P=W/t Where: … Read more
Energy conversion refers to the transformation of energy from one form to another to make it usable for specific tasks or applications. Below is a detailed description of how energy is converted from one form to another in the context of fossil fuel energy, hydroelectric generation, solar energy, nuclear energy, geothermal energy, wind energy, and … Read more