Three identical blocks ,$$4$$, B and C are placed on horizontal friction less surface as shown in fig. $$(+)$$. Theblocks B and C are at rest. The block A is approaching towards B with a speed $$t0$$ m,$$/s$$. The coefficient of restitution for all collisions is $$0$$ . $$5$$. The speed of block C just after collision is

Question

Infinity Learn · Accepted Answer

For collision between A and $$Be=vB$$−vAuA−$$uB=vB$$−$$vA10$$−$$0=vB$$−$$vA10$$ ∴ VB−$$VA=10e=10$$×$$0$$⋅$$5=5$$ Applying the ]aw of conservation of momentum $$mAuA+mBuB=mAvA+mBvB$$ m×$$10+0=mvA+mvB$$ ∴ $$vA+vB=10$$ From eqs. (1) and (2), we get $$VB=7$$⋅$$5m/s$$ For collision between B and C, we have vC−$$vB=7$$⋅$$5e=7$$⋅$$5$$×$$0$$⋅$$5=3$$⋅$$75$$ $$VC+VB=7$$⋅$$5$$ Solving eqs. (3) and (4), we get $$vC=5$$⋅$$6m/s$$

Three identical blocks ,4, B and C are placed on horizontal friction less surface as shown in fig. (+). The
blocks B and C are at rest. The block A is approaching towards B with a speed t0 m,/s. The coefficient of restitution for all collisions is 0 . 5. The speed of block C just after collision is

Remember concepts with our Masterclasses.

Ready to Test Your Skills?

free study material

Three identical blocks ,4, B and C are placed on horizontal friction less surface as shown in fig. (+). Theblocks B and C are at rest. The block A is approaching towards B with a speed t0 m,/s. The coefficient of restitution for all collisions is 0 . 5. The speed of block C just after collision is

Remember concepts with our Masterclasses.

Ready to Test Your Skills?

free study material

Three identical blocks ,4, B and C are placed on horizontal friction less surface as shown in fig. (+). The
blocks B and C are at rest. The block A is approaching towards B with a speed t0 m,/s. The coefficient of restitution for all collisions is 0 . 5. The speed of block C just after collision is