Forces and Motion

What is force?

• A push

• A pull

• A push or pull that causes an object to move.

• Star Wars Term

Answer explanation

A force is a push or pull that causes an object to move. It is measured in Newtons.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

How do we measure force?

• Spring scale

• Measuring cup

• Kitchen scale

• weight scale

Answer explanation

Force is measured by a spring scale. You might see one at a grocery store. They come in many different shapes and sizes.

How do I use a spring scale?

• spring it

• Make sure it is at 0, then attach the object while it is lying down, then pull the opposite end of the scale, and read what it says.

• attach the object

• Measure it

Answer explanation

1. Make sure the indicator is at zero

2. Attach the object to the hook while it is lying flat.

3. Pull on the opposite end of the scale.

4. Read and record the # of Newtons on the scale.

Objects move when....

• a force is applied

• it is standing still

• but it won't move

• when balanced forces are applied

Answer explanation

An object moves when a force is applied.

Tags

NGSS.3-PS2-1

When an unbalanced force is applied, what happens?

• It does not move

• It becomes balanced.

• What is an unbalanced force?

• It moves

Answer explanation

When an unbalanced force is applied, an object moves. When a balanced force is applied, the object does not move.

Tags

NGSS.MS-PS2-2

Is this an example of a balanced or unbalanced force?

• Unbalanced

• Balanced

• Force

• Is it Christmas yet?

Answer explanation

This is an example of a balanced force. The same amount of force is being applied. The rope will not move.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Is this a balanced or unbalanced force?

• Balanced

• Unbalanced

Answer explanation

This is an unbalanced force. An unequal amount of force causes an object to move.

Tags

NGSS.MS-PS2-2

When an object is in motion, what are the two things that change?

• direction

  sight

• balanced

  unbalanced

• direction

  speed

Answer explanation

When an object is in motion, direction and speed change.

Tags

NGSS.MS-PS3-1

What is speed?

• How fast an object is going

• How much something weights

• How much force it has

• The speedometer on my car

Answer explanation

Speed is how fast an object is moving. We measure speed by knowing the distance and time.

Tags

NGSS.MS-PS3-1

Speed is calculation how?

• distance divide by

  tv

• time divided by distance

• distance divided by

  time

Answer explanation

Speed is calculated by dividing the distance by time.

Distance

Time

Tags

NGSS.MS-PS3-1