Revision as of 15:52, 6 October 2008

Outcomes

Pupils should be able to give examples for, label and name a range of forces including Frictional Forces, Gravitational Force (Weight/gravitational pull), Tension Force, Electrical Force (electrostatic attraction/repulsion), Normal Force (Reaction), Magnetic Force, Air Resistance Force (drag), Applied Force (push/pull) and Spring Force.

Forces circus
Discuss the stations as a class. This is an opportunity to use the hand held white boards to test their understanding.
Students are to make their own forcemeter using acetate sheets and steel springs. They are to use the W = m g formula from 3-TAS-01 and mark the scale on their forcemeter with set weights.
They can test their forcemeters by measuring the weight of unknown objects A,B and C

Set up a balloon which is electrostatically charged, on the ceiling, attach a string with a paperclip at the end. With a strong magnet on a retort stand, arrange it so that it is attacting the paperclip in the horizontal direction. See set-up here
Have students draw and label the forces acting on the balloon and paperclip. Ask them to consider the size, direction and type of force

Electrical Force - balloons for electrostatics, rice in a plastic bottle charging polythene rods and using watch glass show repulsion
Frictional- slope with different objects (car, glass block and wooden block) where they change and measure the angle + hovercraft
Magnetic - 2x bar magnets, iron filing in a boiling tube, horse shoe magnets attached to two vehicles with ability to reverse them.
Upthrust - pieces of wood in water, different sized paper boat with paper clips to add, transparent water bath
Strain/Spring force- spring and masses, rubber bands, squashy ball
Gravitational – different masses on a Newton Scale, planetry model
Applied Force – Push or Pull and Thrust – pulling brick with Newton meter, stones on a tray and water jug, stream of peas to drop onto a balance, balloon with a small tube and placed over a large retort stand + balloon pump
Air resistance force/drag– ball bearing dropping through oil, model of dolphin, dropping ball and feather
Tension Force- ball and string, tyrolean traverse with barbie attached
Normal Force- block and strong card

A tank with water in it will be heavy and so is only to be moved by the technician; please refer to the Manual handling section of the Laboratory Lessons Health and Safety Risk Assessment
When using springs goggles must be worn
The main risk is from the vacuum pump and apparatus. The specific risk assessment must be read before using the apparatus.
General Laboratory Health and Safety Risk Assessment

@@ Line 11: / Line 11: @@
 * [[Media:3-FAM-01_Forces_circus.doc|Forces circus]]
 *Discuss the stations as a class. This is an opportunity to use the hand held white boards to test their understanding.
-*Students are to make their own forcemeter using paper tubes and steel springs.  They are to use the W = m g formula from 3-TAS-01 and mark the scale on their forcemeter with set weights.
+*Students are to make their own forcemeter using acetate sheets and steel springs.  They are to use the W = m g formula from 3-TAS-01 and mark the scale on their forcemeter with set weights.
-*They can test their forcemeters by mesuring the weight of unknown objects A,B and C
+*They can test their forcemeters by measuring the weight of unknown objects A,B and C
 ==Plenary==