This is the reason that it is more difficult to get an object moving than to keep it moving.
What is rolling or sliding friction is weaker than static friction?
100
These are the four types of friction.
What are static friction, sliding friction, rolling friction and fluid friction?
100
The resistance to movement one feels during swimming is an example of this type of friction.
What is fluid friction?
100
The SI unit of force is this.
What is the Newton?
100
If two forces are acting upon an object that are equal in magnitude and opposite in direction, then the net force is this.
What is zero?
200
If the net force on an object is unbalanced, then this will occur.
What is the object will move?
200
This unit is equal to the amount of force required to accelerate 1 kg of a substance by 1 m/s2.
What is a Newton?
200
The force that opposes motion between two surfaces that are touching is this.
What is friction?
200
Lubricants act to reduce friction by this mechanism.
What is fill in and cover an object’s microsurfaces?
200
This is the reason for friction?
What is the interaction between microsurfaces?
300
This is the reason very time changes speed when one approaches very massive objects.
What is massive objects deform space-time?
300
This measures the force of gravity pulling on an object.
What is weight?
300
The force of attraction between two masses is this.
What is gravity?
300
Despite the fact that you experience the gravity of the super-massive black hole at the center of our galaxy, this is the reason you are not being sucked towards it right now.
What is the very large distance between you and the black hole?
300
This is a value with both a size and a direction.
What is a vector?
400
Friction turns this type of energy into this type of energy.
What is kinetic energy into heat?
400
Fluid friction can be increased by doing this.
What is increasing the surface area in which the fluid molecules can interact?
400
The idea that the force that causes terrestrial objects to act similarly to celestial objects is this.
What is the Law of Universal Gravitation?
400
This is defined as a push or a pull acting on an object.
What is force?
400
This is why a book sitting on a table does not crash through to the floor.
What is the table is exerting a force on the book that is equal and opposite to the books weight?
500
Two forces with the same direction that are acting on the same object and at the same time will have this effect on the net force being experienced by the object.
What is an additive affect?
500
This is the overall force acting on an object that takes into account all of the individual forces acting on the object.
What is the net force?
500
The SI unit of weight is this?
What is the Newton?
500
The amount of gravity experienced by one object from another object is due to these two factors.
What is the mass of the objects and the distance between the objects?
500
Increasing the weight of an object will have this effect on the friction experienced by the object.