Force and Friction for Primary 3

Tugging a rope is one example of...

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NGSS.MS-PS2-1

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The effect of this forces is ….

• change a shape

• change a direction

• make things stop moving

• make things start moving

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Driver push the brake pedals and the car stop moving at red light, it shows the effect of force is...

• make things stop moving

• change a shape

• change a direction

• make things start moving

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We can use ... to measuring the size of force.

• ruler

• weight scale

• forcemeter

• thermometer

Sir Isaac Newton found the forcemeter, unit of force is ...

• Newton

• Litre

• KG

• KM

Force that opposite with the motion when two surface contact is called...

• pull

• push

• friction

• newton

The bigger friction, is on ……. surface

• rough

• smooth

Tom sliding on rough surface. The friction is small.

• true

• false

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NGSS.MS-PS2-2

One effect of force is can change a shape, it shows in picture …

• 
• 
• 
• 

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Rubbing our hand is one example that friction can produce ....

• cold

• heat

• ice

• push

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