- #1
kencamarador
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A subway trains starts from station A with a uniform acceleration of .5m/s and attains full speed after 50 seconds. It travels at full speed for 120 seconds then is brought to rest at station by by the application of brakes which provides a acceleration of -2.50.
Find the distance between A and B
I divided this solution into 3 stages.
1. Acceleration
2. Constant
3. deacceleration
For the first part, I used Δd=viΔt + 1/2 aav Δt^2
→ 0 x 50 + 1/2 x .5 x 2500 = 625 m
Aav= average velocity and I am finding displacement. Vi is initial velocity. T is time
For the second part. I did the same thing but replace average velocity to full speed velocity which is .5m/s x 50 Seconds. = 25m/s
The third part i don't know..
Find the distance between A and B
I divided this solution into 3 stages.
1. Acceleration
2. Constant
3. deacceleration
For the first part, I used Δd=viΔt + 1/2 aav Δt^2
→ 0 x 50 + 1/2 x .5 x 2500 = 625 m
Aav= average velocity and I am finding displacement. Vi is initial velocity. T is time
For the second part. I did the same thing but replace average velocity to full speed velocity which is .5m/s x 50 Seconds. = 25m/s
The third part i don't know..