Friction
These kind of surfaces will create MORE friction.
Rough surfaces
The rougher the surfaces are, and the harder they press together the (more/less) friction there will be
more
What would happen if there were no gravity on Earth?
Everything and everyone would float away, could not stay on the ground
100 miles per hour is an example of what?
Speed
A force is a ___________________.
push or a pull.
Friction can occur in which states of matter?
Solids, liquids, and gases
When opposite poles of magnets are near each other, the magnetic force causes the poles to....
attract each other
Gravity is the force that keeps the moon moving around __________.
Earth
An object's location relative to another object plus the distance from the other object is its __________.
Position
What kind of forces will NOT produce a change in motion of an object?
Balanced forces
The force that opposes motion between two surfaces that are touching is called
Friction
The needle of a compass moves because of Earth's
magnetism
What is gravity?
The invisible force that pulls objects toward each other (like everything on Earth being pulled towards the ground)!
*Must use the word FORCE to receive points.
A measure of how fast an object is moving is its _________.
Speed
If a force is applied to the side of a moving object, the object will _______.
turn
If you use a lubricant, it will (increase/reduce/not change) the amount of friction.
reduce
The closer two magnets are, the _________ the magnetic force.
greater/stronger
Keeping the moon in orbit with the Earth, keeping the planets in orbit with the Sun.
Which is more difficult to change?
speed of an object with less mass
speed of an object with greater mass
2. speed of an object with greater mass
Gravity and Magnetism
Oil, wax and grease are examples of ___________. These will __________ friction between two surfaces.
Name 3 items that a magnet is found in
compass, lawnmower, refrigerator, X-ray's, CT machines, cochlear implants, etc.
If you drop a 50 pound ball and a 500 pound ball from the same height at the same time, why will they reach the ground at the same time?
Because gravity affects both objects with the same amount of force, it is acting on them in the same way.
The course or path that an object is moving and can be determined by reading a compass is its ___________.
Direction
If an unbalanced force acts on an object at rest the object will move in which direction?
The OPPOSITE direction of the force.