Physics Additional 2.1 Forces And Their Effects
- Created by: Shaye :)
- Created on: 20-12-13 00:33
2.1 Forces and their effects
2.1.1 Resultant forces
-
Forces can change shape or motion of an object
-
Objects can change speed and direction
-
When two objects interact, the forces they exert on each other are equal and opposite
-
A number of forces acting upon an object at one point can be replaced by one force that has the same effect as the original forces acting together
-
This is called the resultant force
-
-
If the resultant force is zero, the object will remain stationary or at a constant speed
2.1.2 Forces and motion
-
Acceleration = resultant force/ mass
-
a=(v-u)/t
-
a= acceleration in m/s^2
-
v= final velocity in m/s
-
u= initial velocity in m/s
-
t= time in seconds
-
-
The gradient of a distance-time graph represents speed
-
The gradient of a velocity-time graph represents acceleration
2.1.3 Forces and breaking
-
When a vehicle travels at a steady speed the resistance balances out the…
Comments
No comments have yet been made