McNeese State University-F × www.saplinglearning com b × www.saplinglearning com
ID: 1631409 • Letter: M
Question
McNeese State University-F × www.saplinglearning com b × www.saplinglearning com b (74) Work and energy Phys × Potential Energy YouTube d www.saplinglearning.com/ibiscms/mod/ibis/view.php?id=3805084 PrintCalculator Periodic Table Available From: 7/5 Due Date: Points Possible Grade Category: Gra Description Policies: Question 10 of 20 Sapling Learning 100 100 A duck is swimming down a river and passes a slow moving log. If the duck is moving 2.50 times faster than the log, but the log has 1.75 times the kinetic energy of the duck, what is the ratio of the log's mass to the duck's mass? Number You can check your ans You can view solutions a You can keep trying to a If the log had a mass of 32.8 kg, and the duck was swimming at 1.00 m/s, what is the log's kinetic energy? Be sure to include units. you get it right or give u There is no penalty for i For multiple-choice ques Number Units on the number of choice eTextbook Help With This Topic OWeb Help & Videos O Technical Support and Previous O Check Answer ) Next ExitExplanation / Answer
the KE = 1/2 m v2
Vduck = 2.5 Vlog
KElog = 1.75 KEduck
1/2 Mlog Vlog2 = 1.75 X 0.5 X Mduck X Vduck2
Mlog / Mduck = 1.75 X Vduck2 / Vlog2
= 1.75 X 2.52
Mlog / Mduck = 10.9375
KE = 0.5 X Mlog X Vlog2
= 0.5 X Mlog X ( Vduck / 2.5 )2
= 0.5 X 32.8 X ( 1 / 2.5 )2
KE = 2.624 J