Question

solve the question.. with explanation..​

Answer 1

Answer:

hey buddy hope it helpss..

plzz refer to attachment ..

Answer 2

Answer:

(a)5.5 cm

Explanation:

system: block

by work energy theorem,

work done by total forces (internal+external) on the system is equal to change in kinetic energy....

=>work done by friction+ work done by spring force=change in kinetic energy

[let the direction of motion of black be +ve..]

=>-15*∆x + (- 1/2*10000*∆x²)=1/2*2*0²-1/2*2*4²

=>-15∆x - 5000∆x²=-16

=>5000∆x²+15∆x-16=0

=>∆x=(-15±√(15²-4*5000*-16))/(2*5000) m

=>∆x=(-15±√(225+320000))/(10000) m

=>∆x=(-15±565.88)/10000 m

=>∆x=550.88/10000 m

[as ∆x should be positive as xf here is greater than xi]

=>∆x≈5.5 cm

thus,the compression of spring =distance Moved by spring=5.5 cm