2.2 The Kinetic Energy of Objects Speeding Up or Slowing Down Flashcards
1
Q
When is work done?
A
When a force causes an object to move through a distance
2
Q
What is the unit for work done?
A
J (Joules)
3
Q
What is gravitational potential energy?
A
The energy an object has because of its vertical position in a gravitational field
4
Q
What is the unit for gravitational field strength?
A
N/kg
5
Q
What is momentum?
A
The “unstoppability” of an object
6
Q
What is the conservation of momentum?
A
The total momentum before an event is equal to the total momentum after an event
7
Q
How does the extension of an elastic object relate to the force?
A
The extension is directly proportional to the force until the force gets too high.
8
Q
What is power?
A
How much work is done in per second
9
Q
What is the unit for power?
A
W (Watts) or J/s (Joules per second)
