Motion & Forces

A force is a ______ or _______ applied to an object.

• Push, tug

• Push, pull

• Shove, push

• Bounce, gravity

Tags

NGSS.3-PS2-1

NGSS.3-PS2-2

Select the unit we use when describing force

• Newton

• Joule

• Liters

• m/s

What is the definition of a net force?

• The force that moves an object.

• The strongest force acting on an object

• The sum of 4 or more forces acting on an object

• The sum of 2 or more forces acting on an object

Tags

NGSS.MS-PS2-2

When forces are balanced, an object is _____

• not moving

• moving

Tags

NGSS.3-PS2-1

When forces are unbalanced, an object is _______

• moving

• not moving

Tags

NGSS.3-PS2-1

What is friction?

• The forces that helps the sliding motion of two surfaces touching.

• The force that opposes the sliding motion of two surfaces touching.

• This is another term for gravity.

• It completely stops an object from moving.

Air resistance is a friction-like force that _______ the motion of objects as they move through the air.

• Opposes

• Supports

• Stops

• Speeds Up

Tags

NGSS.3-PS2-1

True or false: Skydiving is an example of static friction.

• True

• False

Tags

NGSS.MS-PS2-4

The force of air resistance depends on...

• The atmosphere.

• The mass of an object.

• Just the shape of an object

• The speed, shape and size of an object.

True of false: sledding down a hill is an example of sliding friction?

• True

• False