Secure https//edugen wileyplus.com/edugen/student/mainfr.uni LUS Cutnell, Physic

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Secure https//edugen wileyplus.com/edugen/student/mainfr.uni LUS Cutnell, Physics, 10e Physles 1 & II (Algebra Based) (Physics 141 &142) dy & Practice Gradebook ORION Downloadable eTextbook n Assignment BACK EXT RCES Chapter 07, Problem 34 Your answer is partially correct. Try again. The drawing shows a collision between two pucks on an air-hockey table. Puck A has a mass of 0.0410 kg and is moving along the x axis with a velocity of +7.86 m/s. It makes a collision speed of (a) puck A and (b) puck B. 21 with puck B, which has a mass of 0.0820 kg and is initially at rest. The collision is not head-on. After the collision, the two pucks fly apart with the angles shown in the drawing. Find the 28 38 65 37 At r Before collision After collision (a) N (b) Number 2.6 Click If vou would lke to Show Work for this question: Open Show Work Units Tm/s 3.4 m/s

Explanation / Answer

here,

mass of puck A , mA = 0.041 kg

mass of puck b , mB = 0.082 kg

initial speed of puck A , uA = 7.86 i m/s

let the final speed of pucks be vA and vB

using conservation of momentum

mA * uA = mB * vB + mA * vA

0.041 * 7.86 i = 0.041 * vA * (cos(65) i + sin(65) j) + 0.082 * vB * ( cos(37) i - sin(37) j)

0.32 i = ( 0.017 * vA + 0.065 * vB) i + ( 0.0377 * vA - 0.049 * vB) j

on compairing

0.017 * vA + 0.065 * vB = 0.32 ...(1)

and

0.0377 * vA - 0.049 * vB = 0 ...(2)

from (1) and (2)

vA = 4.78 m/s

vB = 3.67 m/s

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