Basic Physics unit 1.1 Flashcards
1
Q
Define scalar
A
Quantity which has magnitude
2
Q
Define Vector
A
Quantity which has magnitude and direction
3
Q
3 Examples of scalar
A
- Speed
- Distance
- Time
4
Q
3 Examples of Vector
A
- Displacement
- Velocity
- Acceleration
5
Q
Force Equation:
A
F=Mg cos(X
6
Q
Define Density
A
Measurement of how tightly a material is packed together
7
Q
Density units
A
kg m ^-3
8
Q
Density formula
A
Density = Mass / Volume
9
Q
Equation of moments
A
Moments = Force X Distance
10
Q
Define Moment
A
product of the force and the perpendicular distance of the line of action of the force from the pivot.
11
Q
Principles of moments (For an object to be in equilibrium)
A
- Resultant force = 0
- Resultant Moment = 0
12
Q
For a symmetrical object where does the mass act?
A
Center of Gravity
13
Q
What is the Center of Gravity?
A
a point where the entire weight of the body (Object) is acting.
14
Q
A
