please show all work !! The system shown remains at rest. Each block weigh block

Question

please show all work !!

The system shown remains at rest. Each block weigh block is: 20 The p W=20N A. 4N B. 8N C. 12 N? D. 16N E. 20N A block moves at 5.0m/s in the positive direction and hits an identical block, initially at rest. A small amount of gunpowder had been placed on one of the blocks. The explosion does not harm the blocks but it doubles their total kinetic energy. After the explosion the blocks move along the z axis and the incident block has a speed of A. 1.8m/s B 5.0m/s Y C. 6.8m/s D. 7.1 m/s E. 11.8m/s

Explanation / Answer

Given the body at rest, hence the force exerted due to lower block should be equal to the friction force of the upper block .That ut prevent his motion.

T= 20 N= force of friction

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