PS Voc Study Tool 13

What happens in an action-reaction force pair?

• One force is stronger than the other.

• Two equal and opposite forces act on different objects.

• Forces always cancel each other out.

• Only one object experiences a force.

What is a collision?

• When two objects hit each other and transfer energy.

• When an object stops moving.

• When an object speeds up.

• When two forces push against each other without touching.

What is a force pair?

• A single force acting on an object.

• Two forces acting in opposite directions on one object.

• Two equal and opposite forces acting on different objects.

• A force that always causes movement.

Newton’s 3rd Law states:

• Objects in motion stay in motion unless acted on by another force.

• The total momentum in a system remains the same.

• For every action, there is an equal and opposite reaction.

• Energy cannot be created or destroyed.

What is a reference frame?

• A structure that holds an object in place.

• A force that resists motion.

• A point of view used to observe motion.

• The speed of an object compared to another object.

What does the conservation of energy mean?

• Energy is only found in moving objects.

• Energy cannot be created or destroyed, only changed or transferred.

• Energy disappears when an object stops moving.

• Energy is always used up completely.

What does the conservation of momentum state?

• Momentum is always lost in a collision.

• An object will stop moving if no force acts on it.

• The total momentum of a system stays the same unless acted on by an outside force.

• Only moving objects have momentum.

What is energy transfer?

• When energy moves from one object or place to another.

• When energy changes form.

• When an object gains mass.

• When an object loses speed.

What is energy transformation?

• When energy moves from one object to another.

• When energy changes from one form to another.

• When energy increases but never decreases.

• When energy disappears.

What is momentum?

• A force that moves an object.

• The amount of motion an object has based on its mass and velocity.

• The speed of an object.

• The weight of an object.