- #1

chwala

Gold Member

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- 285

- Homework Statement:
- Find the value of ##t## when ##P## returns to ##X##

- Relevant Equations:
- Kinematics

My interest is on part (e) only parts a - d were quite easy. I seek an alternative approach for part (e)

...phew this was a nice one ...took me time to figure out.

Find the text solution here:

My take/approach;

We have ##a=0.6 m/s^2##, therefore;

using ##s=ut+\dfrac{1}{2}at^2##, we shall have;

##-0.3t^2+3.6t-3.6=0##

##t_1=1.101##seconds (which we shall reject as ##6<t<12##).

##t_2=10.89≈10.9##seconds.

cheers! Bingo!!

...phew this was a nice one ...took me time to figure out.

Find the text solution here:

My take/approach;

We have ##a=0.6 m/s^2##, therefore;

using ##s=ut+\dfrac{1}{2}at^2##, we shall have;

##-0.3t^2+3.6t-3.6=0##

##t_1=1.101##seconds (which we shall reject as ##6<t<12##).

##t_2=10.89≈10.9##seconds.

cheers! Bingo!!