Find the Perfect Vacation Destination

[Tayto8]

Homework Statement

I've completed it but I don't think it's right could someone please check?

Relevant Equations

Equations of motion

See question and attempt answer below. Thanks.

 

[CWatters]

i), ii) and iii) I agree with your answers.

However check your calculation for the velocity after the initial 2 min acceleration...

V=U+at
U=20 m/s
a=0.2 m/s/s
t=120 s (2min)

= 20 + (0.2*120)
= 20 + 24
= 44m/s

eg not 64m/s

I think you double counted the initial 20m/s.

That effects the stopping time and distance and the time at constant velocity.

 

[Lnewqban]

As explained above, answer iv) and graph are not correct because the calculated value of speed for end of acceleration period/beginning of slope is too high.
For same reason, calculated times values are not correct.