physics paper 1
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14 Terms
What is a scalar quantity?
A quantity that has magnitude (size) only, with no direction.
What is a vector quantity?
A quantity that has both magnitude (size) and direction.
What is displacement?
the straight-line distance and direction from start to finish
What are some examples of vector quantities?
displacement,
velocity,
acceleration,
force,
momentum
What are some examples of scalar quantities?
distance
speed,
mass,
time,
temperature,
energy
Explain why an object moving in a circle at a constant speed has a constantly changing velocity?
Velocity depends on both speed and direction
As the object moves around the circle, its direction is constantly changing.
so its velocity must be changing, even though its speed stays the exact same.
What is the speed of sound in the air?
330 m/s
What is the typical speed of a person walking?
1.5 m/s
What is the typical speed of a person running and cycling?
3 m/s
6 m/s
What are some factors affecting a persons everyday speeds?
fitness
age
distanced travelled
terrain
what does a flat section in a distance time graph mean?
the object is stationary