5.1 Balanced and Unbalanced Forces

The SI unit for force

• newton

• push or pull

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-3

The sum of all forces acting on an object

• newton

• net force

Tags

NGSS.MS-PS2-2

Push or pull

• force

• net force

Tags

NGSS.MS-PS2-1

Can change an objects motion

• unbalanced forces

• gravity

Tags

NGSS.MS-PS2-2

Will not change an objects motion

• unbalanced forces

• balanced forces

The force that pulls objects toward Earth's surface

• gravity

• friction

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

The force that one surface exerts on another when surfaces rub against each other

• gravity

• friction

An object at rest experiences a 15 N force to the right and a 25 N force to the left.

(use subtraction)

• 40 newtons left

• 10 newtons left

Tags

NGSS.MS-PS2-2

Which of the following always causes a change in speed and/or direction?

• gravitational force

• unbalanced forces

Tags

NGSS.MS-PS2-2

What is the force you have to overcome to start moving an object?

• static friction

• fluid friction