5.1 + 5.2 + 5.3 + 5.4 Energy and Work Done Flashcards
1
Q
define energy
1J of energy
A
the ability of a body to do work
2
Q
what is the equation of work done?
A
force (parallel to direction of motion) x distance
3
Q
what does “potential” mean?
A
stored/ hidden energy
4
Q
derive the kinetic energy formula
A
assuming a constant force acts for a time t
5
Q
what is the
1. gravitational potential energy
2. kinetic energy
A
- energy possesed by a body due to it’s position (in a gravitational field)
- energy possed by a body due to it’s motion
6
Q
what is the gravitational potential energy?
A
7
Q
what is the assumption of falling bodies?
A
when a body falls to the ground, it’s drag is ignored
* kinetic energy = gravitational potential energy ( 0.5mv^2=mgΔh)
8
Q
Exam Technique
A
9
Q
Changes in gravitational and kinetic energy
A
