Bill
The friction between an object and air.
What is contact force?
Consider two objects whose masses are 100 g and 200 g. The smaller object strikes the larger object with a force of 500 N. According to Newton’s third law of motion, what force does the larger object exert on the smaller object?
500 N.
High and low tides are the regular pattern of rising and sinking ocean-water levels. They are formed as a result of the gravitational forces of the moon and sun on Earth’s oceans. The moon has a greater effect on Earth’s oceans than the sun. Why would the moon have a greater effect than the sun?
The moon is closer to Earth than the sun is.
A material through which electrons do NOT readily flow is a(n)____.
Insulator
What do you end up with if you cut a magnet in half?
two pieces, each with a north pole and a south pole
Give an example of a force that acts at a distance.
A magnet is pushed away when it is brought near the end of another magnet.
What term describes the tendency of a moving object to continue moving at the same velocity unless an unbalanced force acts on it?
Inertia.
Two objects have a certain gravitational force between them. What would happen if the mass of one of the objects suddenly increased?
The gravitational force between the two objects would increase.
Two objects will attract one another when they have ____ charges.
Opposite
Any material that attracts iron or materials containing iron is called a
magnet.
If the net force on an object is greater than 0, the object will...
act in the direction of the larger force.
The force you have to overcome to start an object moving is ____.
Static Friction.
A satellite orbits Earth because...
it is moving forward while it is in free fall toward Earth.
One example of a good conductor is ____.
Copper.
Sometimes the magnetic strip on a credit card becomes demagnetized. This strip is most likely a(n)
Temporary Magnet
If a car driver suddenly makes a sharp turn, the passenger slides to the side of the car because of...
inertia.
You are riding your bike from Subway to Root, as you are riding, from your reference point, as you ride toward the 4 way stop signs, how does the stop sign appear to be moving?
It looks to be moving toward you.
Normally, atoms are electrically neutral because there are ____.
An equal number of protons and electrons.
An electric field gets stronger as you ____.
The south pole of a magnet ____.
attracts the north pole.
Forces can be balanced or unbalanced. What force would cause an object to change its direction and speed?
What is an unbalanced force?
In order for a space shuttle to leave Earth, it must produce a great amount of thrust. Its rocket boosters create this thrusting force by burning great amounts of fuel. However, once in space, the shuttle needs very little fuel. It circles Earth while gravity pulls it toward Earth. What term describes the motion of the shuttle around Earth?
Orbit.
The buildup of electric charges on an object is called a ____.
Static charge.
The region around a magnet in which magnetic forces can act is called the
Magnetic field.
A scalar quantity that refers to "how much ground an object has covered".
What is distance?