115806
Forces and Motion- Paper 2
- Quantities
- Vector
- Have SIZE and DIRECTION
- Examples...
- acceleration
- Force
- Velocity
- acceleration
- Have SIZE and DIRECTION
- Scalar
- Have SIZE only
- Examples...
- Mass
- Temperature
- Distance
- Speed
- Time
- Mass
- Have SIZE only
- Vector
- Resultant force
- if forces are acting
along the same line add
them end to end
- Example...
- What's the resultant force of a
220N force north, a 180N force
south and a 90N force south?
- Step 1- North can be -, South can be +
- Step 2- add them end to end...
- 180+90-220=50N
- The resultant force is 50N in the South direction
- The resultant force is 50N in the South direction
- 180+90-220=50N
- Step 2- add them end to end...
- Step 1- North can be -, South can be +
- What's the resultant force of a
220N force north, a 180N force
south and a 90N force south?
- Test...
- A kite in the air has 4N upwards, 3N downwards, 2N to
the left and 3.5N to the right...
- a) calculate the resultant upward force,
in newtons, on the kite
- upwards can be +, downwards can be -
- 4-3= 1N upwards
- 4-3= 1N upwards
- upwards can be +, downwards can be -
- b) calculate the resultant
sideways force, in newtons, on the
kite and state its direction
- left can be -, right can be +
- 3.5-2= 1.5N to the left
- 3.5-2= 1.5N to the left
- left can be -, right can be +
- a) calculate the resultant upward force,
in newtons, on the kite
- A kite in the air has 4N upwards, 3N downwards, 2N to
the left and 3.5N to the right...
- Example...
- if forces are acting
along the same line add
them end to end
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