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cneese Stale Universilywww.saplingleaning.co xC This Has Been Asked LikeG mph lo m/'s - Gougle Se x d www.sapinglearning.com/ibiscms/mod/ibis/view.php?id=43739 13 Sapling Learning Jump to.. DeAngelo Vaughn-Allen racmilan lcarning #Altempus Score 11/10/2017 10:00 PM 42.1/100 Assignment Information Question 11 of 19 Available From: Due Date: Points Possible: Grade Category: 10/30/2017 08:00 AM 11/10/2017 10:00 PM 100 Graded Sapling Learning Map e the Skate was an avid physics student whose main non-physics interest in life was high-speed skateboarding. In particular, Nate would otten don a protective suit of Bcunce-Tex, which he invented, and up a high speed on his skateboard, would collide with some oject. In this way, he got a gut lproperties of collisions and succeeded in combinina his two pessions." On one atter feel tor the p occasion, the Skate, with a mass of 115 kg. i statue of Isaac Newton in a perfectly elastic linear collision. As a result, Isaac started moving at 1.01 m/s and Nate bounced backward. What were Nate's speeds immediatety before and after the oollision? (Enter positive numbers.) Ignore friction with the ground. his armor, hurled himself against a 839-kg staticnary Policies: Rubric 1 You can check your answers You can vlew solutions after the due date. You can keep trying lo aiswer each question until you get it right or give up There is no penalty for incorrect answers. For multiple-choice questions, the penalty depends on the number of choices available. Before: Number After: 10 1 Number eTextbook 11 0 mis Help With This Topic 12 0 13 0 O Web Help & Videos By the way, this briefbio of Nate the Skate is written in the past tense, because not long ago he forgat to put on his wil miss him. 140 e-Tex before colliding with th e Washington t in a perfectly inelastic collision. We Technical Support and Bug Reports 15 0 Previcus e, Check AnswerNext ExitExplanation / Answer
from conservation of momentum,
MU + MU = MV + MV .................(1)
and
U - U = V - V ................(2)
where
M = mass 1 = 115 kg
M = mass 2 = 839 kg
U = speed of mass 1 before collision = ?
U = speed of mass 2 before collision = 0 m/s
V = speed of mass 1 after collision = ?
V = speed of mass 2 before collision = 1.01 m/s
115U + 839*0 = 115V + 839*1.01
115U = 115V + 847.39 ....................(3)
from(2)
U - 0 = 1.01 - V
U = 1.01 - V ....................(4)
substitute (equation 4) in (equation 3)
115(1.01 - V) = 115V + 847.39
116.15 - 115V = 115V + 847.39
-732.24 = 230V
V = - 3.18 m/s
substitute that value in (equation 4)
U = 1.01 - (- 3.18)
U = 4.19 m/s
Nate's speed immediately before the collision is 4.19 m/s (forwards)
Nate's speed immediately after the collision is 3.18 m/s (backwards)
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