What is a force?

• A type of energy

• A push or pull

• A kind of matter

• A form of light

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

What is a contact force?

• A force that acts at a distance

• A force that requires objects to be touching

• A force that is invisible

• A force that is weak

What unit do scientists use to measure the strength of a force?

• Joule

• Watt

• Newton

• Pascal

What is a non-contact force?

• A force that acts only when objects are touching

• A force that acts at a distance

• A force that is visible

• A force that is always strong

Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-5

What is friction?

• A force that pulls objects together

• A contact force that opposes motion

• A type of energy

• A magnetic force

Which type of friction occurs when a solid object moves through a fluid?

• Sliding friction

• Static friction

• Fluid friction

• Rolling friction

What type of friction prevents objects from moving when you try to push or slide them?

• Sliding friction

• Static friction

• Fluid friction

• Rolling friction

Which type of friction occurs when an object rolls across a surface?

• Sliding friction

• Static friction

• Fluid friction

• Rolling friction

Image of a skydiver illustrating fluid friction with arrows showing the direction of motion and friction.

• The arrows show the direction of gravity.

• The arrows indicate the speed of the skydiver.

• The arrows represent the direction of fluid friction.

• The arrows depict the altitude of the skydiver.

Tags

NGSS.MS-PS2-5

What is gravity?

• A force that pushes objects away from each other

• A non-contact force that pulls objects with mass toward each other

• A force that only affects objects on Earth

• A contact force that requires physical touch