The equal and opposite forces described by Newton’s third law are called ___________ and _____________ forces.

• action

• reaction

• applied

• conditional

Tags

NGSS.MS-PS2-1

Choose the answer(s) that are true about action-reaction forces

• Newton’s second law describes action-reaction forces

• forces always exist in pairs

• action-reaction forces never cancel

• all action-reaction forces produce motion

Tags

NGSS.MS-PS2-1

Is the following sentence true or false? Action-reaction forces do not cancel each other because the action force is always greater than the reaction force.

• false

• true

Select the answer(s) that affect the momentum of a moving object

• mass

• volume

• shape

• velocity

Tags

NGSS.HS-PS2-2

If two identical objects are moving at different velocities, the object that is moving faster will have ______________ momentum

• greater

• lesser

• equal

Tags

NGSS.HS-PS2-2

You in-line skates are sitting in a box on a shelf in he closet. What is their momentum?

• zero

• two

• one

Is the following sentence true or false? An object with a small mass can have a large momentum if the object is traveling at a high speed.

• true

• false

Tags

NGSS.HS-PS2-2

The momentum of the ball at one second is

Select the answer where the object has the greatest momentum.

• A 700-gram bird flying at a velocity of 2.5 m/s

• A 1000-kilogram car traveling at 5 m/s

• A 40-kilogram shopping cart rolling along at 0.5 m/s

• A 300-kilogram roller coaster car traveling at 25 m/s

Tags

NGSS.MS-PS3-1

Is the following sentence true or false? Objects within a closed system can exert forces on one another, but other objects and forces cannot leave or enter the system.

• true

• false