Forces and motion

A force is a

• pull

• push

• both options are correct

Tags

NGSS.3-PS2-1

the greater the weight

• the greater the motion

• the greater the friction

• the smaller the force needed to move this

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

It is difficult to walk in a lake because of

• air resistance

• water resistance

• rough surface

There is a greater friction when an object moves on a __________ surface.

Air resistance can be reduced by having a __________________________ shape.

Tags

NGSS.MS-ETS1-2

___________ between the moving parts of a machine can be reduced by applying lubricants.

Friction is the force that opposes ____________.

The rougher the surface

• the greater the motion

• the greater the firction

• the smaller the friction

when parts of objects move against each other ___________ is produced.

Without ___________, vehicles will not be able to slow down or stop.

Tags

NGSS.MS-PS2-2