Newton's 1st and 2nd Laws

What is force? (select all that apply)

• a push exerted on an object

• a pull exerted on an object

• a vector, with magnitude and direction

• a scalar, with magnitude only

According to Newton's First Law, if forces are balanced... (select all that apply)

• "a body in motion remains in motion at constant speed in a straight line"

• "every action has an equal and opposite reaction"

• "a body at rest remains at rest"

• "a change in motion will occur"

• net force (F_net) or the total force will be zero

Tags

NGSS.MS-PS2-2

All objects have inertia, whether they are moving or not.

• True
• False

Inertia is the tendency of an object to resist a change in its ___________. 

• temperature
• shape
• size
• motion

Tags

NGSS.MS-PS2-2

What is equilibrium in terms of forces?

• when the net forces total zero

• when the net forces are greater than one

• when an object is constantly accelerating forward

• an object with an unbalanced force

Tags

NGSS.MS-PS2-2

What happens if forces are unbalanced? (select all that apply)

• a change in motion occurs

• an object at rest begins to accelerate

• the forces do not effect the change in motion

• an object in motion begins to decelerate

Tags

NGSS.MS-PS2-2

With unbalanced forces, the object will move in the direction of the _______ force.

• larger

• smaller

• equal

Tags

NGSS.MS-PS2-2

How can the forces acting on an object be combined to show the net force acting on an object?

• add vectors going in the same direction

• subtract vectors going in opposite directions

• use the Pythagorean theorem for vectors traveling at right angles of each other

• subtract vectors going in the same direction

• add vectors going in the opposite directions

Tags

NGSS.MS-PS2-2

Mass is...

• a scalar quantity

• a vector quantity

• a variable that changes with location (i.e. Earth, Moon, Outer-space, or other planets)

• the same everywhere in the universe (does not change)

• the amount of matter in an object (measurement of an objects inertia)

Acceleration is defined as the CHANGE in 

• time it takes for one place to move to another place. 
• velocity of an object.
• distance divided by the time interval 
• velocity divided by the time interval