Page 63 - oxford_discover_2B_student_book

Speed

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I ___________ _

A force can change the speed of things. The next time you

When you push a door with a small force, see something

it opens slowly, but when you push a moving, ask

door with a big force, it opens quickly.
yourself, "What

force is moving it,

Think a push or a pull?

What’s the cause of the Is the force small

door opening slow ly? or big?"
What’s the effect of the

door being pushed with
a small force?

151