# Shared Flashcard Set

## Details

Chapter 13: Gravitational Interactions Questions
Chapter 13 Gravitational Interactions Questions
13
Physics
12/27/2011

Term
 Magnetic field
Definition
 a force field that surrounds a magnet
Term
 Neap tide
Definition
 due to the sun & moon partly canceling each other’s gravitation effect
Term
 Weightlessness
Definition
 absence of a support force
Term
 Solar eclipse
Definition
 moon is between the sun and Earth
Term
 Lunar eclipse
Definition
 Earth is between Sun and moon
Term
 True or False:A black hole has more gravitational field than the star from which it came.
Definition
 False, the masses are the same)
Term
 Equation for:Any object’s gravitational field
Definition
 g = F/mg = G m1 m2/r2/m1g = G m/r2)
Term
 If you stepped into a hole bored completely through Earth, what kind of motion would you experience?
Definition
 Oscillation
Term
 At the center of the earth what is the net force or you?
Definition
 Zero, all of the mass is pulling you outward in different directions
Term
 If you know the mass and radius of any planet, what can you calculate?
Definition
 g at the surface
Term
 What does g depend on?
Definition
 mass of the object and radius of the object
Term
 If you are in an elevator that is falling freely, the scale reads zero, are you weightless?
Definition
 Yes, according to the scale, because you are not supported, No, because you are accelerating toward the center of the Earth
Term
 Why are there two tides a day?
Definition
 ocean nearest the moon is pulled toward the moon, and the main body of Earth is pulled toward the moon, away from the ocean on the far side
Supporting users have an ad free experience!