4th Forces and Motion Vocabulary

- two forces acting in opposite directions on an object, and equal in size. Anytime there is a balanced force on an object, the object stays still or continues moving continues to move at the same speed and in the same direction.

• motion

• lever

• balanced forces

• unbalanced forces

a stiff bar that rests on a support called a fulcrum which lifts or moves loads.

• pulley

• inclined plane

• screw

• lever

the earth’s pull on things. Things on or near the earth are pulled toward it by this. ____________ is always present.

• gravity

• forces

• wedge

• wheel and axle

Tags

NGSS.MS-PS2-4

- Forces that cause a change in the motion of an object are _____________________.

• balanced forces

• lever

• unbalanced forces

• motion

Tags

NGSS.MS-PS2-2

a simple machine that uses grooved wheels and a rope to raise, lower or move a load.

• screw

• lever

• pulley

• wheel and axle

object with at least one slanting side ending in a sharp edge, which cuts material apart.

• wedge

• screw

• forces

• gravity

a machine containing two or more simple machines.

• velocity

• simple machine

• compound machine

• acceleration

a slanting surface connecting a lower level to a higher level.

• wedge

• wheel and axle

• forces

• inclined plane

Tags

NGSS.MS-PS3-2

the change of position of an object.

• lever

• motion

• screw

• forces

Tags

NGSS.MS-PS2-2

- A wheel with a rod, called an axle, through its center lifts or moves loads.

• wheel and axle

• lever

• inclined plane

• motion

Tags

NGSS.MS-PS2-1