Work, Power and EnergyHard
Question
system is placed on a rough horizontal surface having coefficient of frictional μ. The spring initial elongation 
and the block is released from rest. rest For the subsequent motion
and the block is released from rest. rest For the subsequent motionOptions
A.Initial acceleration of block is 2μg.
B.Maximum compression in spring is 
C.Minimum compression in spring is zero
D.maximum speed of the block is 
Solution
For (A) : initial acceleration = 
For (B, C) :
Therefore maximum compression =
and minimum compression = 0
For (D) : At maximum speed Fnet = 0 so by using work energy theorem
mv2 = 
k 
⇒ v = 2μg
For (B, C) :
Therefore maximum compression =
and minimum compression = 0For (D) : At maximum speed Fnet = 0 so by using work energy theorem
mv2 = k ⇒ v = 2μgCreate a free account to view solution
View Solution FreeMore Work, Power and Energy Questions
A spherical ball of mass 20 kg is stationary at the top of a hill of height 100 m. It rolls down a smooth surface to the...Two masses of 1 g and 4 g are moving with equal kinetic energies. The ratio of the magnitudes of their momenta is...A body of mass 10 kg is released from a Tower of height 20m and body acquires a velocity of 10 ms-1 after falling throug...A thermodynamic system undergoes cyclic process ABCDA as shown in figure. The work done by the system is :-...A sphere of radius 2 cm, moving with a velocity of 81 cm/s, collides with another sphere of radius 4 cm at rest. The col...