Flashcard Review Energy Forces and Motion

Front

What is kinetic energy?

Back

Kinetic energy is the energy an object possesses due to its motion. It depends on the mass and speed of the object.

Front

What factors affect kinetic energy?

Back

Both the mass and speed of an object affect the amount of kinetic energy it has.

Front

Why does a ball eventually stop when rolled down a hallway?

Back

A ball stops due to friction and air resistance acting against its motion.

Front

What is Newton's First Law of Motion?

Back

An object at rest stays at rest, and an object in motion stays in motion at a constant velocity unless acted upon by a net external force.

Front

What is inertia?

Back

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

Front

What is the action-reaction principle in Newton's Third Law?

Back

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

Front

What is the reaction force when a bat hits a ball?

Back

The reaction force is the force of the ball against the bat.

Front

What does Newton's Second Law state?

Back

Newton's Second Law states that the acceleration of an object is equal to the net force acting on it divided by its mass (F=ma).

Front

What is friction?

Back

Friction is a force that opposes the motion of an object, caused by the contact between surfaces.

Front

What is air resistance?

Back

Air resistance is a type of friction that acts against the motion of an object moving through air.