Vectors
displacement and velocity are examples of what?
vectors
which distance is easiest to measure with a ruler?
book width
A car travels 254 km in 4 hr. What is it's Average speed?
63.5 kmh
a flat line on a speed-time graph means the object is?
traveling at a constant speed
acceleration measures how fast what is changing?
velocity
what is an example of a vector?
displacement
a passenger in a moving car is at rest relative to which?
front seat
speed is the ratio of distance to what?
time
a constant slope on a distance-time graph means what kind of speed?
constant speed
which shows acceleration by change in motion?
ball in circle
vector addition is used when motion involves?
more than one VELOCITY
If a driver goes north 3 blocks, east 3, then south 3, What is it's displacement?
East 3 blocks
An object moves 100 m in 4 s, then rests 1 s. Average speed?
20 m/s
Speed-time graph shows speed 10 m/s for 10 s, then slows to stop at 30 s. Slope is?
linear downward
constant acceleration due only to direction change is?
circular motion
What is the total displacement of 1 km south, 3 km north, 6 km south, 2 km north?
2 km
what formula calculates speed?
s=d/t
Train slows from 25 m/s to 10 m/s in 240 s. Acceleration is? (positive or negative)
negative
what unit is used for acceleration?
m/s2
An object at 30 m/s stops in 5 s. What is acceleration?
-6 m/s2