Types of Motion
What are the three types of motion?
At Rest, Constant Speed, Acceleration
A car is moving with a constant speed of 30 meters per second. What is its average speed after 40 seconds of motion?
30 m/s
You are sitting at your desk. What type of motion is this?
At rest
A cyclist rides 4000 meters in 3 minutes. What is the average speed of the cyclist?
vavg = d/t
vavg = (4000 m) / 180 s
vavg = 22.2 m/s
A ball is rolling down a ramp. What state of motion is this?
Acceleration
A car moves at an average speed of 30 meters per second for 20 minutes. How far did the car travel?
vavg = d/t
30 m/s = d/(1200s)
d = 36000 m
What is the difference between instantaneous speed and average speed?
Average speed is a measurement over time that summarizes the speed of an object. Instantaneous speed is an object's speed in a specific moment.
A boat is moving at a constant speed of 15 meters per second. How long does it take for the boat to travel 1000 meters?
vavg = d/t
15 m/s = (1000 m)/t
d = 66.7 seconds
A car has zero acceleration. What is/are the possible state(s) of motion of the car?
vavg = d/t
403 m/s = (374,515,315,200 m)/t
t = 929,318,400 s
years = 929,318,400 s / 60 s in a min / 60 min in an hr / 24 hrs in a day / 365 days in a yr
t = 29.5 years