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Physics unit 1

Terms in this set (18)

Origin
a point or object from which motion is determined
frame of reference
all motion Is relative and based on frame of reference
most common frame of reference
earth
scalar
(distance) magnitude (number) ex: 300m 5m/s
vector
(displacement) value and direction ex: +300m -5m/s
units for distance and displacement
x/m
distance
total ground an object covers; scalar (number)
displacement
difference between starting and ending point; vector
units for speed and velocity
symbol: v and units: m/s
speed
the rate at which an object covers distance; scalar
velocity
the rate at which the position changes; vector (+,-)
formula for average speed
distance/time
formula for average velocity
displacement/time
an object travels +21m in 35 seconds, then -45m. In 22 seconds. Determine the average speed and average velocity.
speed: 0.42 m/s velocity: -1.5 m/s
units for acceleration
m/s^2
acceleration
the rate of change of velocity
acceleration=
(final velocity-start velocity)/time
three methods of acceleration
speeding up, slowing down, change in direction
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