motion Flashcards
what is the standard si unit for speed? acceleration?
velocity, m/s2
what is the difference between distance and displacement?
distance- how far you traveled displacement- when you subtract two distances to get your position
calculate the speed of a car that travels 72 miles in 9 hours.
8 mph
what does the slope of a position vs. time graph tell us?
speed (p. 31)
what does the slope of a velocity vs. time graph tell us?
acceleration (p. 38)
what is the difference between position and distance?
position- where you stand distance- length of space
what is the difference between speed and velocity?
speed- describes movement from one place to another velocity- describes movement from one place to another and includes a distance
what is meant by positive, negative and 0 acceleration?
positive- speeding up negative- slowing down 0- no acceleration
i was driving down the street at 60 m/s. i saw a police officer and immediately slowed to 30 m/s. this all took 3 s. what was my acceleration?
-10m/s2
answer the following about the graph
displacement is increasing- a displacement is decreasing- c speed is constant- a&c speed is 0 m/s- b
using the position-time graph on the page, calculate the speed of the object from 1 s- 3s
2 m/s
on a position vs. time graph, explain what steep slope means
higher position
answer the following about the graph:
- pos. acceleration
- neg. acceleration
- no acceleration
pos: a
neg: c
none: b
list the ways you can change the acceleration of an object
- speed up
- slow down
- change direction
describe how changing the angle of a ramp affects the acceleration of an object
it can make it go faster or slower, or not move at all
