Vocabulary
What is a Contact Force
A Push or Pull on one object by another object that is touching
Mass is Measured in Newtons
False (Mass is measured in ππ’π₯π¨π π«ππ¦π¬)
While Weight is in πππ°ππ¨π§π¬
What is a force pair
Two Equal Force In Opposite Directions
What is Static Friction
A type of friction that prevents surfaces from sliding past each other
What is Circular Motion
is any motion in which an object is moving along a curved path
What is a Noncontact Force
A Push or Pull on one object by another object that is not touching
If an object has twice the size of another object it has half the weight.
False (If an object has twice the Mass of another object it has half the weight.)
What is the third law of motion
when one object exerts a force on a second object, the second objects exerts a force of the same size
What is Sliding Friction
Sliding friction is a force that opposes the motion of surfaces sliding past each other.
What are three ways that forces can change the motion of an object
Increasing Force
Increasing Speed
And Changing Direction
What does Weight mean
Weight is a gravitational force exerted on a object
An Objects weight is proportional to its mass
True (An Objects weight is proportional to its mass)
What is the net force needed to accelerate a 81kg bed forward at 9 m/s^2
Note-^2= 2 squared
Its (729) because the Formula for Net force is Mass x Acceleration which would get you 729 newtons
What is Fluid Friction.
Fluid Friction is friction between a surface and a fluid like water or soap.
What is the second law of motion
The acceleration of an object is equal to the net force acting on the object divided by the objects mass
What is the law of universal gravitation
That all objects are attracted to each other by a gravitational force.
(Note- that the strength of the force depends on the mass of the object and the distance between them.)
The weight of an astronaut in orbit about 90 percent of the astronaut's weights on Earth
(True) weight of an astronaut in orbit about 90 percent of the astronaut's weights on Earth
What is the Law Of Conservation of Momentum
the total momentum of a group of objects stays the same unless outside forces act on the object
What Causes Friction.
(Microscopic dips and bumps cover all surfaces the dips and bumps on one surface catch on the dips and bumps on the other when they are sliding past each other) and the produce motionπ€―
What is Centripetal Force
in circular motion, a force that acts perpendicular to the direction of motion, toward the center of the curve is Centripetal Force
-Note a ball will accelerate in the direction of the centripetal force like the Moon and Earth
What is Inertia
Inertia is the tendency of all objects to resist any change in motion.
An object that has twice as much mass as another weighs four times as much.
(False) An object that has twice as much mass as another weighs twice as much.
what is the Momentum Equation
Momentum= Mass x Velocity
What effect does distance have on gravity.
Attraction between objects decreases as the distance between the objects
What is the third law of motion
to every action their is equal and opposite reaction.