Bill Nye - Motion Video Questions

Front

What is inertia?

Back

Inertia is the tendency of an object to resist changes in its state of motion. An object at rest stays at rest, and an object in motion stays in motion unless acted upon by an external force.

Front

How does mass affect inertia?

Back

The more mass an object has, the more inertia it has. This means heavier objects are harder to start or stop moving than lighter objects.

Front

Is the amount of inertia a body has dependent on its mass?

Back

No, the amount of inertia a body has is not dependent upon its mass.

Front

True or False: The inertia of a bowling ball is the same as the inertia of a golf ball.

Back

True.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object and does not change regardless of location. Weight is the force of gravity acting on that mass and can change depending on the gravitational pull.

Front

True or False: The mass of an object is the same regardless of where it is measured.

Back

True.

Front

True or False: Only objects that are not moving have inertia.

Back

False. All objects, whether moving or at rest, have inertia.

Front

What does the formula F=ma represent?

Back

The formula F=ma represents Newton's second law of motion, where F is force, m is mass, and a is acceleration. It shows that the force needed to move an object is equal to its mass times its acceleration.

Front

If you have two bowling balls, how much force is needed to move them compared to one bowling ball?

Back

The amount of force necessary to move two bowling balls is twice the force necessary to move one bowling ball.

Front

What happens to an object's motion if no external force acts on it?

Back

If no external force acts on an object, it will continue in its current state of motion, either at rest or moving at a constant speed in a straight line.