Motion

Why does a rolling ball stop?

• Gravity
• Friction
• Waterfalls
• Sand

Tags

NGSS.MS-PS2-2

LT5: The rate at which velocity CHANGES is: 

• acceleration
• speed
• direction
• physics

Tags

NGSS.MS-PS2-2

Wheels on a skateboard most likely experiences-

• Rolling Friction
• Sliding Friction
• Fluid Friction
• Static Friction

What are 2 factors that determine the amount of friction between 2 objects?

• Force and roughness between surfaces
• hills and valleys and how smooth or rough the surface is
• Amount of force and amount of surface the comes in contact
• The force and the weight exerted on the surfaces

In which of the following activities is friction harmful? 

• car engine parts wearing out
• a person walking
• an eraser erasing
• brakes stopping a car

Balanced or unbalanced?

• balanced
• unbalanced

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

What would you call a tree if you compared it with a moving car?

• reference point
• beacon
• compass
• friction

What type of friction acts upon a non-moving object?

• Static Friction
• Kinetic Friction
• Rolling Friction
• Sliding Friction

What is the net force on an object when you combine a force of 25 N West with a force of 10 N East?

• 35 N West
• 15 N East
• 15 N West
• 35 N East

Tags

NGSS.MS-PS2-2

What causes a change in motion on an object?

• balanced force
• unbalanced force
• balanced mass
• unbalanced mass

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4