Download 1.1.1---1.1.2-Forces-DIRT

I can name some forces.
Complete a list of different forces and give an example of where each
can be found.
Lift
Friction
Tension
Magnetic
Air
Resistance
I can describe what forces do.
Use the information below to explain the different things that forces do.
A force is…
You cannot _______ a force,
but you can _______ a force
and see the _______ of the
force.
Words for gap fill:
- Feel
- Effects
- See
Forces make things happen or stop them from happening. There are 3 effects of
forces;
1. A force can
change the ______
of an object.
2. A force can
change the _____
of an object,
making it…
3. A force can
change the
________of an
object.
I can identify a ’contact force’ and ‘non-contact force’.
Sort the forces below into ‘contact’ and ‘non-contact’ forces.
Contact forces need to
touch an object before they
can affect it.
Non-contact forces can
affect objects from a
distance.
Air Resistance
Forces to
sort:
Tension
Magnetic
Lift
Upthrust
Friction
Weight
Static Electricity
I can describe what interaction pairs mean & identify some in a situation.
Use the information below to describe what interaction pairs
mean and give some examples using the pictures to help.
Forces occur when there is an interaction between two
objects. These forces always happen in pairs – when one object
exerts a force on another, it always experiences a force in
return.
One common interaction pair of forces is
found in a rocket or a jet engine:
•As the fuel burns, exhaust gases are
produced.
•The rocket engine pushes these gases
out backwards.
•The gases push the space shuttle
forwards, with the same size force in the
opposite direction.
That’s how rockets work.
I can interpret force diagrams used to illustrate problems involving gravity.
Using the example below to help, complete the forces diagram worksheet and
explain what is happening in each in terms of; What is the forces acting on
the object? Are they balanced? Which direction is the object moving?
The forces acting in the vertical direction on
the astronaut is thrust upwards and weight
downwards. These forces are unbalanced with
a resultant force of 1N upwards.
The forces acting in the horizontal direction
are balanced and so the astronaut is moving at
a constant speed.
I can make predictions about pairs of forces acting in unfamiliar situations.
For each of the examples on the worksheet, decide in what direction
the resultant force goes and add an arrow to show direction of
resultant force. Label the arrow with the size of the resultant force.
Example
5N
The resultant force would be acting
downwards with a size of 10N
Resultant
force 10N
15-5 = 10N
15N
I can list examples of balanced and unbalanced forces.
Use the images below to give 3 examples of balanced
forces and 3 examples of unbalanced forces.
I can calculate resultant forces.
For each of the examples on the worksheet, decide in what direction
the resultant force goes and add an arrow to show direction of
resultant force. Label the arrow with the size of the resultant force.
Example
5N
The resultant force would be acting
downwards with a size of 10N
Resultant
force 10N
15-5 = 10N
15N
I can draw a force diagram for a problem involving gravity.
Use the information below to create a basic force diagram using
a box to represent the object. Make sure you label the forces and
their sizes on the diagram.
A person has just jumped out of the plane
and opened their parachute to slow their
landing. The open parachute has created
an air resistance force upwards of 250N.
The weight of the person is 180N. The
wind is pushing the person to the right
with a force of 25N and friction/air
resistance is pushing to the right with a
force of 25N.
I can explain why speed/direction of objects can change using force arrows.
Answer the following questions in your book in full
sentences.
In a forces diagram…..
- What two things does the arrows tell you?
- How can you determine which direction the object is
moving?
- How can you tell if the speed is changing?