Lesson 3: kinetic energy Flashcards
1
Q
What is kinetic energy?
A
Kinetic energy is stored in moving objects.
2
Q
What factors affect kinetic energy?
A
- Mass of an object (requires more energy to reach resting velocity.)
- Speed of an object.
3
Q
How can you calculate kinetic energy?
A
½mass x velcoity²
4
Q
What are the units for mass and velocity?
A
- Mass: kg
- Velocity: m/s
5
Q
What is the realtionship between mass and kinetic energy?
A
- Mass and kinetic energy are directly propertional.
- As mass doubles, kinetic energy doubles too.
6
Q
What is the relationship between speed and kinetic energy?
A
- As speed doubles, kinetic energy quadruples.
Speed increases KE more than mass
7
Q
What is the rearranged equation for finding mass?
A
2KE/v²=m
8
Q
What is the rearranged equation for finding velocity?
A
√2KE/m=v
