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# In Fig. 8.22b, the kinetic energy of the Ping-Pong ball is ISBN: 9780321675460 31

## Solution for problem 13DQ Chapter 8

University Physics | 13th Edition

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Problem 13DQ

In Fig. 8.22b, the kinetic energy of the Ping-Pong ball is larger after its interaction with the bowling ball than before. From where does the extra energy come? Describe the event in terms of conservation of energy.

Step-by-Step Solution:

Solution 13DQ Step 1 of 3: Before collision the the bowling ball of mass M was moving with speed v and the ping b1 pong ball is at rest with velocity zero v = 0 as shown in the figure below, p1 The energy of the system before collision, E 1 Kinetic energy of bowling ball + potential energy of ping pong ball E1= mv2 2 + PE ………….1 b1 Step 2 of 3: After collision with the ping pong ball with mass m, the bowling ball speed reduces to a value v b2d the fraction of initial kinetic energy of bowling ball and initial potential energy of the ping pong ball will add up to give some speed (v ) orp2inetic energy for the ping pong ball(which was at rest before) as shown in the figure below, The total energy of the system after collision, E = Kinetic energy of bowling ball + Kinetic energy of ping pong ball 2 1 2 1 2 E 2 mv2 b2+ 2mv …p2…..2

Step 3 of 3

##### ISBN: 9780321675460

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