Category 1
What is the force that pulls objects towards the center of the Earth?
Gravity
Which of Newton's laws tells us that an object in motion tends to stay in motion and that the only way for an object to slow down, speed up, or turn is if a force acts on the object?
Newton's First Law
As velocity decreases, the object gets closer/further from Earth?
Closer
True or False: This activity's scenario also applies to the forces that exist between the Sun and planets.
True, the attractive force of gravity between the Sun and a planet and the velocity of the planet are both responsible for its orbit.
True or False: There is no gravity in space.
False
What happens as the spacecraft speeds up?
The spacecraft eventually overpowers the gravitational pull of the Earth and leaves the Earth's orbit.
An orbit is the balance between the velocity of the object and what force?
The planet's gravitational force
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