Physics chapter 3 Flashcards
Definition of force
The action of one body on a second body that causes its velocity to change
What can force change in an object
- Its direction
- Its speed
- Its shape
Define resultant force
The sum of all the individual forces acting on it, taking their direction into account
What does a vector have
Both a magnitude and direction
What does a scalar have
Only magnitude
The Si unit for mass
Kg
The Si unit for weight
N / Newtons
Definition of mass
The amount of matter in an object
how much is 1kg of mass in newtons
10N
Define Terminal Velocity
Steady speed achieved by an object, free-falling through a gas or liquid.
Formula for momentum
Mass x Velocity
What is the principal of conservation of momentum in collision
Total momentum before collision = Total momentum after collision
Formula for resultant force
V1^2 + V2^2 = R2
