DFA Flashcardizz 1

Front

What is the reaction force when a book falls to the floor?

Back

The force of the floor on the book.

Front

What does the equation Zn + HCl -> ZnCl2 + H2 demonstrate?

Back

It shows how matter is conserved in a chemical reaction.

Front

What is net force?

Back

The overall force acting on an object, taking into account all individual forces.

Front

What happens when two trains with different masses stop with the same force?

Back

The train with the smaller mass will require less time to stop than the train with the larger mass.

Front

Why can fishing spiders walk on water without breaking the surface?

Back

They don't break the cohesive forces holding the water molecules together.

Front

Define inertia.

Back

Inertia is the tendency of an object to resist changes in its state of motion.

Front

What is the principle of conservation of mass?

Back

In a closed system, mass is neither created nor destroyed during a chemical reaction.

Front

What is the formula for calculating net force?

Back

Net force = Total forces acting in one direction - Total forces acting in the opposite direction.

Front

Explain the concept of action and reaction forces.

Back

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

Front

What is the role of gravity in falling objects?

Back

Gravity pulls objects toward the center of the Earth, causing them to fall.