For questions 2&3 consider the following situation: Three blocks, of unknown rel

Question

For questions 2&3 consider the following situation: Three blocks, of unknown released from rest at the same starting height of height of 1.50 meters: Block A is on the 20.0 degree frictionless incline; Block B is on a 55.0 degree frictionless incline; and Block C is allowed to fall freely straight down. Which of the three blocks will have the greatest final velocity at the Block A Block B Block C All three will have same time of descent Cannot determine from the information given Which of the three blocks will reach the bottom in the shortest Block A Block B Block C All three will have same time of descent Cannot determine from the information given

Explanation / Answer

1)d

because there is no friction, and all blocks having same potential energy at top will have same kinetic energy at bottom

2)c

block C has highest magnitude of acceleration and lowest distance to be covered,

Other blocks have acceleration g sin theta and path length H/sin theta

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