8. Two identical blocks are released from rest at the same height. Block A slides down...
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8. Two identical blocks are released from rest at the same height. Block A slides down a steeper ramp than Block B. Both ramps are frictionless. The blocks reach the same final height indicated by the lower dashed line. Three students are comparing the work done on the two blocks by the normal force: Annika: "I think the normal force doesn't do any work on either block. The force on the block by the ramp is Block A Start Block B - Finish perpendicular to the ramp, and the displacement is parallel to the ramp. So the dot product is zero." BoBae: Craig: "Work is force times displacement. The work done on Block A is negative, while the work done on Block B is positive, because the displacement for B is in the positive direction, while the displacement for A is in the negative direction." "Since work is force times distance, and the distance the block travels is greater for Block B, the work done is greater for Block B." With which, if any, of these students do you agree? Annika BoBae Explain your reasoning. Craig. None of them 8. Two identical blocks are released from rest at the same height. Block A slides down a steeper ramp than Block B. Both ramps are frictionless. The blocks reach the same final height indicated by the lower dashed line. Three students are comparing the work done on the two blocks by the normal force: Annika: "I think the normal force doesn't do any work on either block. The force on the block by the ramp is Block A Start Block B - Finish perpendicular to the ramp, and the displacement is parallel to the ramp. So the dot product is zero." BoBae: Craig: "Work is force times displacement. The work done on Block A is negative, while the work done on Block B is positive, because the displacement for B is in the positive direction, while the displacement for A is in the negative direction." "Since work is force times distance, and the distance the block travels is greater for Block B, the work done is greater for Block B." With which, if any, of these students do you agree? Annika BoBae Explain your reasoning. Craig. None of them
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Related Book For
Fundamentals of Physics
ISBN: 978-0471758013
8th Extended edition
Authors: Jearl Walker, Halliday Resnick
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