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Vocabulary
Vocabulary
Questions for Ch.1
Questions for Ch.2
Questions for Ch.3
100
A Reference Point is a starting point used to describe the position of an object.
What's the definition for Reference Point?
100
Velocity is a vector that represents an object's speed and direction.
What's the definition for Velocity?
100
Distance is how long you walk. Displacement is the difference between the initial position and the final position of an object.
Describe the difference between distance and displacement?
100
When more then one force acts on an object.
Explain how forces combine?
100
Density
....... is the mass per unit volume of a material
200
A Vector is a quantity that has both a size and a direction.
What's the definition for Vector?
200
Linear is a relating to or resembling a straight line.
What's the definition for Linear?
200
You have to specify both the object's speed and its direction of motion.
Explain why velocity is a vector?
200
More than one force can act on an object at the same time.
Identify forces acting on common objects?
200
The buoyant force on an object is equal to the weight of the fluid the object displaces. Then the weight of the fluid displaced depends only on the density and the volume of the fluid displaced.
Explain Archimedes' principle?
300
Displacement is the difference between the initial position ans the final position of an object.
What's the definition for Displacement?
300
Friction is a contact force that opposes the movement between two surfaces in contact.
What's the definition for Friction?
300
It's distance with time.
Explain how speed is a rate of change?
300
Static friction is the force between two surface in contact that keeps them from sliding when a force applied. Sliding friction is always opposite to the velocity of the sliding object.
Analyze static and sliding frictional forces?
300
The overall density of a metal boat is made smaller by making the volume of the boat larger and the boat haves a large volume that is filled with air, witch the overall density of the boat can be smaller than the density of water.
Why do metal boats float?
400
Elastic Force is a force the exerted by a material when it is stretched or compressed.
What's the definition for Elastic Force?
400
A Tension Force is a pulling force applied to an object that can make an object stretch.
What's the definition for Tension Force?
400
In the rate at witch velocity changes with time.
Determine when acceleration occurs?
400
If an object is moving, a net force applied in the same direction the object is moving cause the object to speed up.
When does an unbalanced force cause an object to speed up?
400
Balloons can float in air because they contain helium gas, witch the air is made of mostly nitrogen gas and oxygen gas that are much denser than helium.
Why does a helium balloon float in air?
500
Acceleration is a rate of change of velocity with time.
What's the definition for Acceleration?
500
Compression Force is a squeezing force applied to an object that can make an object shrink.
What's the definition for Compression Force?
500
The speed is zero and doesn't change.
Describe the speed-time graph of an object that is not moving?
500
Newton's second law of motion.
........... states that an object's acceleration is the ratio of net force to the object's mass?
500
It's used to measure the density of a liquid.
What is a Hydrometer used for?