Forces Flashcards
Force effects
- Deformation, changes the shape
- Change the motion (stop or move)
- Direction
Deformation happens in
- Elastic = non-permanent change
- Plastic = permanent change
Formula for Weight/Fgravity
M x 9,8 (direction down): measured in Newtons
Types of magnetic force
- Force of attraction
- Force of repulsion
Unit of measurement for Force
Newtons (N)
We measure force using an instrument called
Spring balance
Types of Contact forces
- Friction
- Compression
- Tension
Types of non-contact forces
- Magnetic forces
- Gravitational force (weight)
For work to be done
- A force must be applied
- The object must move in the direction of the force (displacement)
Work formula
W = F x 🔼x
Power formula
P = w
—
🔼t
Law of conservation of energy
Energy cannot be created or destroyed but is transferred from one form to another
Kinetic energy formula
Ek = 1/2mv2
Gravitational potential energy formula
Ep = mgh
Mechanical energy formula
Emechanical = Ep + Ek
The principle of conservation of mechanical energy
In the absence of air resistance/any external forces, the mechanical energy of an object is constant
1 horse power
710 W
Newtons 3rd Law
For every action force, there is an equal and opposite force
