HW 18 - Force & Motion

Definition of air resistance

• force that pulls objects toward's Earth's surface

• force in liquid that keeps objects afloat

• frictional force air exerts against a moving surface

• force directly exerted on an object

Definition of gravity

• force that pulls objects toward Earth's surface

• force in liquid that keeps objects afloat

• force directly exerted on an object

• frictional force air exerts against a moving object

Tags

NGSS.HS-PS2-4

To calculate net force, when forces are acting in the same direction, the forces are ...

• added 
• subtracted 
• mutiplied 
• divided 

What is the net force?
100 N        230 N
<------        --------->

• 30 N to the right
• 230 N to the right
• 130 N to the right
• This is a balanced force

The force that opposes the motion of two surfaces sliding past each other is called ___________.

• acceleration
• inertia
• friction
• unbalanced

If you travel to Mars, where gravity is 38% of Earth's gravity, what will happen to your mass and weight?

• Your mass and weight will both be greater than on Earth.
• Your mass and weight will both be less than on Earth.
• Your mass will be the same, but your weight will be less than on Earth.
• Your mass will be less than on Earth, but your weight will be the same.

the ability to do work

• energy
• force
• friction
• inert

Tags

NGSS.MS-PS3-5

a push or a pull acting upon an object

• force
• motion
• energy
• friction

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

the close interaction between two surfaces that are sliding across each other

• force
• friction
• centripetal force 
• gravitational force

Any two objects with mass attract each other with a type of force 

• kinetic energy
• potential energy
• inertia
• gravitational force

Tags

NGSS.MS-PS2-4