Lesson One Review: Describing Motion and Force

A push or pull

• gravity

• friction

• newton

• force

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A girl is riding in a bike. What reference point can be used to argue that the child is NOT in motion?

• a tree

• the bike

• the road

• a cloud

An object is in motion if it's position is ______________

• changing relative to a reference point

• at rest

• not changing relative to a reference point

• none of the above

Forces are described by ___________ and ___________

• strength and distance

• position and distance

• strength and direction

• position and direction

Tags

NGSS.MS-PS2-1

The ___________________ is the sum of all the forces acting on an object

• balanced force

• net force

• normal force

• unbalanced force

Tags

NGSS.MS-PS2-2

George pushes his friend down the road on his new wagon. Which two terms accurately describe the net force acting on the sled?

• unbalanced and contact

• balanced and contact

• unbalanced and noncontact

• balanced and noncontact force

Tags

NGSS.MS-PS2-2

_____________________ is a force that pulls objects towards each other as a result of their masses.

• Gravity

• Magnetism

• Friction

• All of the above

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

The SI Unit for force is the ______________.

• meter

• kilogram

• pound

• Newton

Two gym classes are playing tug-of-war with a rope. One class pulls on the rope with a 80 N force to the right, the other pulls with a 25 N force to the left. Which two statements describe this situation?

• The net force acting on the rope is 105 N to the left

• The net force acting on the rope is 55 N to the right

• The forces are balanced, and have a net force of zero

• The forces are unbalanced, and have a net force greater than zero

Tags

NGSS.MS-PS2-2

If two forces acting on an object are equal in strength and opposite in direction, then the forces __________ and _______________. (Choose 2 responses)

• are balanced

• have a net force of zero.

• are unbalanced.

• have a net force of greater than zero