Need help in Physics Q19

[Salman Khalid]

I cannot understand question number 19 , and i cant find the marking scheme
can any one of u help me solve the question and if possible send me the marking scheme.

 

[abdul aziz123]

Its an easy question read the book about hookes law the formulas its related to that and energy conservation

 

[aniekan]

a) The ruler or table is smooth surface, therefore it has no friction .

b) They have the same velocity although only one has horizontal velocity.

c1 mgh=1/2mv^2
v=root (2gh)
= root(2*9.81*0.85) = 4.08m/s (3sf) or 4.1m/s(2sf)

D) Horizontal components
Time = 0.42s
Distance =1.1m

Velocity = displacement / time = 1.1/0.42 = 2.62(3sf) or 2.6(2sf)

Vertical velocity = 4.1m/s

Magnitude velocity = root(4.1^2 + 2.6^2) =4.85m/s(3sf) or 4.9m/s(2sf)

Angle of velocity to horizontal : tan@ = 4.1/2.6 >< @ = tan(inverse)[1.5769] = 57.6*