Newton's First Law

When all individual forces acting on an object are balanced, it is the natural tendency of an object to _____.

• eventually stop

• accelerate

• either speed up, slow down or keep the same speed

• keep its velocity constant (either at a zero or non-zero value)

The law of inertia (Newton's first law) applies _____.

• to moving objects only

• only to objects that are not moving

• to both moving and nonmoving objects

Inertia refers to _____

• the tendency of moving objects to remain in motion

• the force which keeps moving objects in motion with a constant velocity

• the force that keeps stationary objects at rest

• the tendency of stationary objects to remain at rest

A skateboard rolls down a hill, reaches the level surface and eventually comes to a stop. The fact that the skateboard ultimately stops is best explained by ____.

• an unbalanced force would be required to keep the sled moving forward at constant speed

• the presence of an unbalanced force (e.g., friction) can cause a moving object to stop

• the presence of inertia causes it to stop

• the natural tendency of any object is to ultimately stop

Tags

NGSS.MS-PS2-2

what is the net force

• 17N

• 3N <-----

• 3N------>

• 10N ------->

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

• This is an Unbalanced Force

• This is a Balanced Force

Tags

NGSS.MS-PS2-2

• This is an Unbalanced Force

• This is a Balanced Force

What is the net force

• 5N ---->

• 5N<--------

• 0N

• 10N

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

If an object is stationary (not moving) the forces acting upon it are _____________

• unbalanced
• weak
• balanced
• Hulk Smash!

the tendency of an object to resist a change in its motion

• acceleration
• inertia
• mass
• frame of reference