Question

"A trolley of length 2,2m is released from rest,  an unknown distance from P on an inclined plane.  At the end of the 5th sec The front of the trolley (F)  passes point P.  At the end of the 6th second the back of the trolley)(B)  passes point P. If acceleration is uniform, calculate the magnitude of acceleration"

Anyone please help :'( this sum is killing me

Answer 1

You just need the formula \[s=s _{0}+ut+\frac{ 1 }{ 2 }at^2\] where s is the distance travelled, s0 is the initial position and u the initial speed

here, you can take s0=0 and u=0

then just focus on the position of the front of the trolley. You know that at t=6 it has moved 2.2 meters compared to where it was at t=5.
That gives you two equations in s and a that you you can solve for a.