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Assessment
What is the principle of inertia, which was greatly refined by Galileo?
An object in motion stays in motion unless acted upon by an external force.
A force is needed to keep an object moving.
Objects fall faster the heavier they are.
An object at rest will always remain at rest.
Which of Galileo's inventions greatly improved the study of motion?
The telescope.
The pendulum.
The compass.
The barometer.
What did Galileo discover about the rate of falling objects?
They fall at different rates depending on their weight.
They fall at the same rate regardless of their mass.
Air resistance has no effect on falling objects.
The speed of falling objects increases steadily with time.
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