Gravity and Friction

You can reduce friction by

• reducing surface area
• removing lubricant
• increasing mass

Which type of friction exists between a surface and moving air?

• static friction
• sliding friciton
• fluid friciton

Which factor is NOT involved in determining gravitational force?

• distance
• speed
• mass

A __________ is NOT a force.

• fall
• push
• pull

Gravity and magnetism are examples of contact forces.

• True
• False

Tags

NGSS.MS-PS2-4

Weight is the measure of gravitational force on an object.

• True
• False

Tags

NGSS.MS-PS2-4

Mass and weight are not related to each other.

• True
• False

Forces have strength and direction.

• True
• False

Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-1

NGSS.MS-PS2-2

 A push or a pull on an object

• friction
• force
• gravity
• kilogram

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Push of pull on one object by another object.

• magnetic force
• noncontact force
• electric force
• contact force

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2