HP Games pen Assignment Chapter 06, Problem 026 roblem ublem The figure shows th

Question

HP Games pen Assignment Chapter 06, Problem 026 roblem ublem The figure shows three crates being pushed over a concrete floor by a horizontal force of magnitude 628 N. The masses of the crates are m-29 kg, m- ka, and m - 21 kg. The coefficient of kinetic friction between the floor and each of the crates is 0.7. What is the magnitude Fa2 of the force on crate 3 from crate 23 roblem Problem robism Protlem Protiem Pukien Units Number the tolerance is +/-2% Click if you would like to Show Work for this question: en Shiow Work SHOW HINT GO TUTOREA Prcbinn INK TO TEN ts lnx.stuts Question Attempts: 0 of 10 used FR LE

Explanation / Answer

here,

F = 628 N

m1 = 29 kg

m2 = 8 kg

m3 = 21 kg

uk = 0.7

the accelration of system , a = net force /effective masss

a = (F - uk * (m1 + m2 + m3) * g )/(m1 + m2 + m3)

a = ( 628 - 0.7 * ( 29 + 8 + 21)* 9.81)/(29 + 8 + 21) m/s^2

a = 3.96 m/s^2

for m3

let the contact force on crate 3 from 2 be F32

F32 - uk * m3 * g = m3 * a

F32 = 0.7 * 21 * 9.81 + 21 * 3.96 N

F32 = 227.4 N

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