- #1
StephenDoty
- 265
- 0
A car starts from rest and accelerates 3 m/s^2 for 3 sec. then continues with a constant velocity for 60 sec. Then accelerates at -5m/s^2 for 3 sec. then continues at a constant velocity for 30 sec.
What is the distance the car traveled
what is the average speed
displacement
average velocity
part of the solution:
for first 3 sec traveled 9 m/s and traveled 27m
then how do you find the constant velocity that the car traveled for 60 sec?
is it still 9m/s? if it is then it traveled 540m
then -15m/s for 3sec. or -15m
then is the constant velocity still 9m/s? If it is then it traveled 270m
If all of this is correct then the car traveled 792m
average speed= 8.25m/s
displacement = 792m
average velocity= 8.25m/s
What is the distance the car traveled
what is the average speed
displacement
average velocity
part of the solution:
for first 3 sec traveled 9 m/s and traveled 27m
then how do you find the constant velocity that the car traveled for 60 sec?
is it still 9m/s? if it is then it traveled 540m
then -15m/s for 3sec. or -15m
then is the constant velocity still 9m/s? If it is then it traveled 270m
If all of this is correct then the car traveled 792m
average speed= 8.25m/s
displacement = 792m
average velocity= 8.25m/s