Potential & Kinetic Energy Flashcards
What is meant by Kinetic energy?
Kinetic energy is the energy something has when it is moving
What is the equation for gravitational potential energy?
Gravitational = mass X g X height
Potential energy
What is gravitational potential energy measured in?
Joules (Ep)
On earth what is our gravitational field strength?
10 N/kg
What is the equation for kinetic energy?
Kinetic = 1/2 X mass X speed(2)
Energy
When something falls what is it’s potential energy converted into?
When something falls its potential energy is converted into kinetic energy
How do you space shuttles cope with the heat former by kinetic energy when entering the atmosphere?
Space shuttles have heat Shields made from special materials which lose heat quickly, allowing the shuttle to re-enter the atmosphere without burning up
How do most to meet yours not hit the earth?
Temperatures become so extreme that most meteors burn up completely before reaching the earth
What causes work to be done in the atmosphere?
Friction due to collisions with particles in the atmosphere transfers some of their kinetic energy to heat energy and work is done
When an elastic object is stretched what is this energy stored as?
Elastic potential energy
The extension of an elastic object is directly proportional to….?
The extension of an elastic object is directly proportional to force
What is equation for elastic potential energy?
K= Spring constant F= force e= extension
F=k X e
What is gravitational potential energy?
The energy an object has due to its vertical position in the gravitational field
Why don’t many meteors hit the earth?
Friction as they enter the atmosphere transfers some of their kinetic energy to heat, The temperature gets so extreme that most Burn up
What is the limit of proportionality(
The maximum force that an object can take and still extend proportionally
