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Kinetic Energy
In physics, the kinetic energy (KE) of an object is the energy that it has due to its motion. It is defined as the work needed for an object of a known mass to accelerate to a given velocity.
What is Kinetic energy?
In physics, the kinetic energy (KE) of an object is the energy that it has due to its motion. It is defined as the work needed for an object of a known mass to accelerate to a given velocity.
Kinetic energy equation
To calculate Kinetic energy we write the equation like this.
$E_k = { 1 \over2} mv {^2}$
Kinetic energy demo
In this tutorial you will learn how to calculate the energy stored in a moving object.
Chilled practice question
Copy out the question and attempt to calculate the answer before watching the solution. Write down the equation and show all of your working, remember to add the units to your answer, this routine will guarantee you maximum marks in an exam. Mark your solution and correct if needed.
Calculate the Kinetic energy store in a car with a mass of 850 Kg moving at a velocity of 3.5 m/s.
Frozen practice question
Copy out the question and attempt to calculate the answer before watching the solution. Write down the equation and show all of your working, remember to add the units to your answer, this routine will guarantee you maximum marks in an exam. Mark your solution and correct if needed.
A meteorite has 8000 J of Kinetic energy, calculate its mass if it has a velocity of 20 m/s
Science in context
Anything that is moving has energy in its kinetic energy store.
Millie’s Master Methods
The ability to rearrange equations is the first step to successfully solve Physics calculations. Millie’s Magic Triangle Teaches you to be confident when transposing an…
Performing and mastering this routine will guarantee you maximum marks when solving Physics calculations. Calculation Master Class Top Mark Routine Applying this technique will ensure…
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Uniform Acceleration
Uniform or constant acceleration is a type of motion in which the velocity of an object changes by an equal amount in every equal time period.
Demo
In this tutorial you will learn how to calculate uniform acceleration.
The equation is written like this:
${ \text v^{2} \; \text – \; \text u^{2} \; \text = \; \text 2as}$
Chilled practice question
A racing car travelling at 20 m/s decelerates uniformly at 1.5 m/s2 towards a slip road 100 m away. Calculate its velocity when it reaches the slip road.
Frozen practice question
A ball is dropped 12 m from the top of a building. Calculate the velocity of the ball when it hits the ground. Ignore any value for air resistance. Acceleration due to gravity is 9.8m/s2
Science in context
Uniform or constant acceleration is a type of motion in which the velocity of an object changes by an equal amount in every equal time period.
Millie’s Master Methods
The ability to rearrange equations is the first step to successfully solve Physics calculations. Millie’s Magic Triangle Teaches you to be confident when transposing an…
Performing and mastering this routine will guarantee you maximum marks when solving Physics calculations. Calculation Master Class Top Mark Routine Applying this technique will ensure…
The Fridge Physics Store
Student feedback in seconds – Voice to label thermal bluetooth technology Click Here To Visit Store
Why not buy a Fridge Physics baseball cap, woollen beanie, hoodie or polo shirt, all colours and sizes available. Free delivery to anywhere in the UK ! … Get Fridge Physics MerchRead More »
