What is force?

• The ability to do work

• A push or a pull

• A measure of mass

• The speed of an object

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

In what units do we measure force?

• Joules (J)

• Newtons (N)

• Meters (m)

• Kilograms (kg)

When a force applied to an object moves that object, it is called ​ (a)   . We measure it in (b)   .

• work
• Joules
• force
• electric force
• Newtons
• Kilograms

Match the definitions to the words.

• Balanced Force

• When the net force is 0N

• Net Force

• Quantities that deal with both the magnitude and direction of a force

• Vector Quantities

• When the net force is anything greater than 0N

• Unbalanced Force

• The sum of all forces acting on an object

• Scalar Quantities

• Quantities that deal with magnitude of a force only

Tags

NGSS.MS-PS2-2

Which of the following is an example of friction force?

• A parachute slowing a skydiver down in the air

• A magnet sticking to a fridge

• A heavy box on a carpet being pushed

• Earth pulling the moon in its orbit

What is an example of gravity as a force?

• A heavy box on a carpet being pushed

• A parachute slowing a skydiver down in the air

• Earth pulling the moon in its orbit

• Pushing someone down

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

Which of the following is an example of magnetic force?

• Earth pulling the moon in its orbit

• A heavy box on a carpet being pushed

• A magnet sticking to a fridge

• Pushing someone down

Tags

NGSS.MS-PS2-3

What is an example of air resistance?

• A magnet sticking to a fridge

• Earth pulling the moon in its orbit

• Pushing someone down

• A parachute slowing a skydiver down in the air

Tags

NGSS.MS-PS2-2

Calculate the net force for the free-body diagram labeled "A".

• 40N to the right

• 40N to the left

• 80N to the right

• 20N to the left

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Calculate the net force for the free-body diagram labeled "B".

• 25N upward

• 25N downward

• 75N upward

• 75N downward