Conceptual: Physics I
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A hypothetical planet has a mass one-third of and a radius three times that of Earth. What is the acceleration due to gravity on the planet in terms of g, the acceleration due to gravity on Earth?
The planet's orbital period will be one-half Earth's orbital period.
A planet is discovered orbiting around a star in the galaxy Andromeda at the same distance from the star as Earth is from the Sun. If that star has four times the mass of our Sun, how does the orbital period of the planet compare to Earth's orbital period?
The net force is directed toward the center of the circular path.
An object moves in a circular path at a constant speed. What is the direction of the net force acting on the object?
The velocity and acceleration vectors are perpendicular
An object moves in a circular path at a constant speed. What is the relationship between the directions of the object's velocity and acceleration vectors?
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True: The path of the planets around the Sun is elliptical in shape. True: The Sun is located at one of the foci of the planets' elliptical orbits.
The gravitational force increases by a factor of 4.
Two objects attract each other gravitationally. If the distance between their centers decreases by a factor of 2, how does the gravitational force between them change?
There is no component of force acting along the direction of motion of the satellite.
Why does a satellite in a circular orbit travel at a constant speed?
