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level: Mechanical Energy Transfers

Questions and Answers List

level questions: Mechanical Energy Transfers

QuestionAnswer
What happens when an Object falls, in terms of Work Done?-As the Object is falling, work is Done on the Object by the Force, from Gravity -This is literally Weight [Mass x GFS]
If an Object is Thrown Upwards, what happens with its Kinetic Energy Store, and Gravitational Energy Store?-So the Work Done by the Force allows it to get Height, and the Energy will be Transferred to the Gravitational Potential Energy Store
Give the Formula for: -Kinetic Energy -Gravitational Energy-Kinetic Energy = 0.5 x mass x (speed)² -Gravitational Energy = Mass x Height x GFS
What happens if an Elastic Object is Squashed via a Moving Object?-Work is Done [Energy is Transferred] against the Spring, meaning the Objects Kinetic Energy Store to the Elastic Potential Energy Store of the Object
Give the Formula for Energy Transferred to the Elastic Potential Energy of a Stretched / Squashed Spring?0.5 x Spring Constant x (Extension)²
What happens in a Device that is Plugged in a Socket?-Its simply Connected to the National Grid, so Energy is Transferred Electrically to the Socket, from the Main
In a Circuit, how can a -Speaker -Bulb -Kettle -Motor Use the Energy from the Battery?-The Speaker Transferred Energy away from the Speaker via Sound Waves -Energy is Carried Away from the Circuit by Light Waves -Energy is Transferred into the Thermal Energy Store of the Kettle -Energy is Transferred to the Kinetic Energy Store of the Motor
In a Circuit, how can a -Wires -Motor -Kettle Waste the Energy from the Battery?-The Wires will have Energy Transferred to the Thermal Energy Store, heating up the Wires -The Motor will also Heat up, wasting Energy -The Kettle will Heat up the Surroundings and Unneeded Parts of the Kettle
What does the Power Rating tell you?-This can simply state how much Power the Appliance use per Second -Or it tells you how much Power the Appliance uses per Hour