Forces and Newton's First Law

A person is pushed forward into their seat belt when a car stops. Which law is this?

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

The tendency of an object to resist a change in motion is...

• inertia

• kinetic energy

• vector

• net force

The law of inertia (Newton’s First Law) applies

• to both moving and nonmoving objects

• only to moving objects

• only to objects that are not moving

A greater applied force is required to move an object with a greater mass than one with a smaller mass.

• True

• False

Tags

NGSS.MS-PS2-2

The SI units for force are...

• Kilograms

• Newtons

• Meters per second

• Pounds

The ______of an object tends to make the object resist being set into motion.

• mass

• force

• motion

• unbalanced forces 

Tags

NGSS.MS-PS2-2

Without a force to stop or slow a coasting object, the object will coast forever in a ______ line. 

• blue

• red

• straight

• vertical 

_________ opposes the motion of one object moving past another. 

• friction 

• velocity

• unbalanced forces

• simple machines 

friction is a force that acts 

• in the same direction as the motion

• opposite to the direction of the motion

• opposite to the applied forces

• the same direction as the applied force

What kind(s) of objects have inertia?

• all objects with mass

• only objects at rest

• only objects in motion

• only objects whose motion is being changed