The unit of measuring force is ....

Force that pulls all object towards the Earth is called ....

causes car tyres wear off is an example of ....

• helpful force

• not helpful force

the ... object make the dark shadow.

What should he do to make a bigger shadow?

• move the stick to A

• move the stick to B

• move the stick to C

• move the stick to D

Force cannot be measured.
True or False?

• True

• False

Friction acts in the same direction that the object is moving in
True or False?

• True

• False

Friction can be both helpful or not helpful
True or False?

• True

• False

Smooth surfaces have less friction at all
True or False?

• True

• False

Which sentences describe how a shadow is formed?

• An opaque object forms a shadow when it allow only some light to pass through it.

• An opaque object forms a shadow when it blocks light from passing through it.

• A transparent object forms a shadow when it blocks light to pass through it.

• A translucent object forms a shadow when it allow only some light to pass through it.