Patterns of Motion & Friction

What is a pendulum?

• a weight tied on a string that swings back and forth

• something you write with

• a musical instrument

What is resistance to motion called?

• friction

• inertia

• electricity

• force

Why can rubbing two sticks together quickly start a fire?

• the friction between the two sticks produces heat

• because they are made of wood and wood burns

• the fraction between two sticks creates a whole piece big enough to burn

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

How is friction reduced between an air hockey puck and the table?

• a layer of air that reduces friction is created and pumped through tiny holes in the table

• a layer of oil is rubbed on the puck to make is slide better

• the puck is actually magnetic and it repels against table

Tags

NGSS.MS-PS2-2

Which of these increases the friction of someone walking on the floor?

• sand paper

• grease

• oil

• banana peel

The tread on car tires is just for decoration.

• true

• false

Tags

NGSS.MS-PS2-2

Which of these things would be affected by friction? (Check all that apply)

• airplanes

• air hockey

• melting ice cream

• a ball sitting in a field

Tags

NGSS.MS-PS2-2

In the big pendulum Izzy and Zoe made, how does each component swing?

• each individual block swings back and fourth

• all the blocks swing in the same direction at the same time

• the blocks all stop moving at the same time

• they don't move

How are the interesting patterns created by the swinging blocks?

• each block has different lengths of string so they swing at different speeds.

• each block as the same length of string so they all swing together at the same speed

• each block has different lengths of string so they all swing at the same speed.

Tags

NGSS.MS-PS3-2

What causes a swinging pendulum to slow down over time?

• friction

• grease

• collision

• motion

Tags

NGSS.MS-PS2-2