universiti teknologi mara - phy430... · web viewsolutions – phy430 – exercises – sept 2012...

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45 45 x y 1 SOLUTIONS – PHY430 – Exercises – Sept 2012 – Jan 2013 Question 13 page 16 ρ= m V = ( 23.94 g 210 cm 3 ) ( 1 kg 1000 g ) ( 10 6 cm 3 1 m 3 ) =11400 kg m 3 Question 36 page 70 a) R=( B cos45 °+C cos 45 ° ) ^ i+( A +B sin45 °C sin45 °) ^ j b) R= R x 2 +R y 2 ¿ ( 40.0cos45 °+30.0 cos 45° ) 2 +( 20.0+ 40.0 sin 45 °30.0sin45 ° ) 2 ¿ 2450 +733 ¿ 56.4 unit s tan θ= R y R x ∴θ=tan 1 ( 733 2450 ) =16.7 Question 29 page 50 xx o =v o t+ 1 2 at 2 62.4 =v o ( 4.20) + 1 2 (5.60 )( 4.20) 2 R x R y

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SOLUTIONS – PHY430 – Exercises – Sept 2012 – Jan 2013

Question 13 page 16

(4545xy)Question 36 page 70

a)

b)

Question 29 page 50

Question 48 page 52

Question 25 page 133

Question 2 page 158/Question 42 page 195/ Question 15 page 225

Question 32 page 227/Question 11 page 308

Question 6 page 483/Question 7 page 483/ Question 8 page 593

Question 32 page 368/Question 25 page 425

Question 31 page 594/Question 5 page 457