Glencoe Physics: Principles and Problems, Student Edition
Glencoe Physics: Principles and Problems, Student Edition
1st Edition
ISBN: 9780078807213
Author: Paul W. Zitzewitz
Publisher: Glencoe/McGraw-Hill
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Chapter 9, Problem 73A
To determine

The velocity and the direction in which K jumps.

Expert Solution & Answer
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Answer to Problem 73A

  1.26m/s in the same direction as that of initial motion

Explanation of Solution

Given:

The mass of K, mK=42.00kg

The mass of skateboard, mS=2.00kg

The initial speed of K and skateboard, vi=1.20m/s

After K jumps, the skateboard stops. Hence, the final velocity of skateboard, vf=0m/s

Formula used:

Momentum of an object of mass m and moving with velocity v is given by,

  p=mv

And, law of conservation of linear momentum: Momentum is conserved in a closed and isolated system and is given by,

  pi=pf

Calculation:

Consider K and the skateboard as a system, then it will be a closed and isolated system and law of conservation of momentum can be applied to it.

Assume the initial direction of motion of Kas positive.

Let, the final speed of K be vKf , then using the law of conservation of linear momentum,

  pi=pf(mK+mS)vi=mKvKf+mSvSf

Using given values in above,

  (42+2)(1.2)=(42)(vKf)+(2)(0)vKf=1.26m/s

Positive sign of the above velocity denotes that K jumps in the initial direction of motion.

Conclusion:

Thus, the velocity with which Kjumps is 1.26m/s in the same direction as that of initial motion.

Chapter 9 Solutions

Glencoe Physics: Principles and Problems, Student Edition

Ch. 9.1 - Prob. 11SSCCh. 9.1 - Prob. 12SSCCh. 9.1 - Prob. 13SSCCh. 9.1 - Prob. 14SSCCh. 9.1 - Prob. 15SSCCh. 9.1 - Prob. 16SSCCh. 9.2 - Prob. 17PPCh. 9.2 - Prob. 18PPCh. 9.2 - Prob. 19PPCh. 9.2 - Prob. 20PPCh. 9.2 - Prob. 21PPCh. 9.2 - Prob. 22PPCh. 9.2 - Prob. 23PPCh. 9.2 - Prob. 24PPCh. 9.2 - Prob. 25PPCh. 9.2 - Prob. 26PPCh. 9.2 - Prob. 27PPCh. 9.2 - Prob. 28PPCh. 9.2 - Prob. 29PPCh. 9.2 - Prob. 30SSCCh. 9.2 - Prob. 31SSCCh. 9.2 - Prob. 32SSCCh. 9.2 - Prob. 33SSCCh. 9.2 - Prob. 34SSCCh. 9.2 - Prob. 35SSCCh. 9 - Prob. 36ACh. 9 - Prob. 37ACh. 9 - Prob. 38ACh. 9 - Prob. 39ACh. 9 - Prob. 40ACh. 9 - Prob. 41ACh. 9 - Prob. 42ACh. 9 - Prob. 43ACh. 9 - Prob. 44ACh. 9 - Prob. 45ACh. 9 - Prob. 46ACh. 9 - Prob. 47ACh. 9 - Prob. 48ACh. 9 - Prob. 49ACh. 9 - Prob. 50ACh. 9 - Prob. 51ACh. 9 - Prob. 52ACh. 9 - Prob. 53ACh. 9 - Prob. 54ACh. 9 - Prob. 55ACh. 9 - Prob. 56ACh. 9 - Prob. 57ACh. 9 - Prob. 58ACh. 9 - Prob. 59ACh. 9 - Prob. 60ACh. 9 - Prob. 61ACh. 9 - Prob. 62ACh. 9 - Prob. 63ACh. 9 - Prob. 64ACh. 9 - Prob. 65ACh. 9 - Prob. 66ACh. 9 - Prob. 67ACh. 9 - Prob. 68ACh. 9 - Prob. 69ACh. 9 - Prob. 70ACh. 9 - Prob. 71ACh. 9 - Prob. 72ACh. 9 - Prob. 73ACh. 9 - Prob. 74ACh. 9 - Prob. 75ACh. 9 - Prob. 76ACh. 9 - Prob. 77ACh. 9 - Prob. 78ACh. 9 - Prob. 79ACh. 9 - Prob. 80ACh. 9 - Prob. 81ACh. 9 - Prob. 82ACh. 9 - Prob. 83ACh. 9 - Prob. 84ACh. 9 - Prob. 85ACh. 9 - Prob. 86ACh. 9 - Prob. 87ACh. 9 - Prob. 88ACh. 9 - Prob. 89ACh. 9 - Prob. 90ACh. 9 - Prob. 91ACh. 9 - Prob. 92ACh. 9 - Prob. 93ACh. 9 - Prob. 94ACh. 9 - Prob. 95ACh. 9 - Prob. 96ACh. 9 - Prob. 97ACh. 9 - Prob. 98ACh. 9 - Prob. 99ACh. 9 - Prob. 100ACh. 9 - Prob. 101ACh. 9 - Prob. 1STPCh. 9 - Prob. 2STPCh. 9 - Prob. 3STPCh. 9 - Prob. 4STPCh. 9 - Prob. 5STPCh. 9 - Prob. 6STPCh. 9 - Prob. 7STPCh. 9 - Prob. 8STPCh. 9 - Prob. 9STP
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