Lessons 5-8 Flashcards
1
Q
what is potential energy
A
energy stored away
2
Q
what is kinetic/active energy
A
energy in use
3
Q
what is the formula to find kinetic energy
A
1/2 x mass x velocity ^2
1/2mv^2
4
Q
formula to find GPE?
A
GPE= mass x gravity x height
GPE= mgh
or
GPE= mgΔh
5
Q
what does gravity= on earth
A
9.8N/kg but Y11 physics simplifies to 10N/kg
6
Q
what is work
A
the energy transferred to/from an object due to force moving it a parallel displacement (distance).
7
Q
formula to calculate work?
A
Work= Force x distance
W =Fd
8
Q
Difference between weight and mass?
A
Weight force changes depending on what planet you are on but mass always stays the same.
9
Q
formula to calculate weight force?
A
weight force= mass x gravity
Fw= mg
10
Q
what is weight force measured in
A
Newtons, N
