Forces Vocabulary

a push or pull on an object

• friction

• force

• inertia

• momentum

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the force that two surfaces exert on each other when the two rub against each other

• friction

• force

• inertia

• momentum

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the force that pulls objects toward each other

• gravity

• free fall

• weight

• Universal Law of Gravitation

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Are forces applied when the objects involved are in direct contact.

• Contact forces

• Normal forces

• action-at-a-distance forces

Label the forces acting in this picture.

a

b

c

d

gravity

tension

applied force

normal

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Label the forces acting in this image.

a

c

d

b

gravity

friction

normal force

applied force

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Label the forces acting in this picture.

a

b

c

applied

air resistance

gravity

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Is the force usually exerted by a surface on an object that is resisting against it.

• Friction

• Normal force

• Elasticity

• Tension

Rina’s mother asked her to help move some items from the hall closet to the garage. One item she wanted to move was a large box of old school books. Rina tried to lift the box, but could not pick it up. What force was Rina NOT able to overcome?

• frictional force
  frictional forcefrictional force

• gravitational force

• electrical force

• magnetic force 
  magnetic force
  

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Force is measured in....

• Galileos 

• Newtons

• Di Vincis

• Einsteins 

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