Chrome File Edn People W MasteringPhysics: PY211 Spr2016 Hw a D- 8446171 PY 211

Question

Chrome File Edn People W MasteringPhysics: PY211 Spr2016 Hw a D- 8446171 PY 211 General Physics Spring 2016 PY21LEcrans my Exercise 824 Exercise 8.24 Part A Block A nthe fgureegel has mass 1.00kg, and block B has mass 3.00 kg. The blocks are forced together compressing a spring 5 between them, then the system is released from which has negligible mass, is not fastened to elther block and drops to the surface after it has expanded. Block B acquires a speed of 1.40 m/s What is the nail speed of block A rest on a level, frictionless surface. The spring. m/s My Answers Give Part B Figure 1 My Answers G U -3.00 kg 1.00kg

Explanation / Answer

A) The momentum of the system before the release is 0 so it will be 0 after release

It's mava=mbvb. So, va=mbvb/ma. So, va=3(1.4). va=4.2

B) Potential energy = kinetic energy

= 1/2*1*1.4^2 + 1/2*3.0*0.467^2 = 1.31J

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