P3h-The energy of games and theme rides Flashcards
1
Q
Why do objects have gravitational potential energy?
A
Because of their mass and position in earths gravitational field
2
Q
Describe the KE and GPE of a body falling through the atmosphere at terminal speed?
A
Kinetic energy doesn not increase
Gravitational potential energy is transferred to increased internal or thermal energy of the surrounding air particles through the mechanism of friction
3
Q
What does doubling mass do to KE?
A
Doubles KE
4
Q
What does doubling speed do to KE?
A
Quadrouples KE
5
Q
What is the equation for mgh?
A
Mgh=1/2 mv2
6
Q
What can the equation for mgh be rearranged as for a given object falling to earth?
A
H = v2 ÷ 2g
