NAME: PHYSICS 235 TEST 2 DATE: FALL, 2016 Average Speed total distance total tim

Question

NAME: PHYSICS 235 TEST 2 DATE: FALL, 2016 Average Speed total distance total time Average velocity total displacement/total time AVAt G-6.67 v 10 N m kg' Vi at g 9.8 m/s M, 5.98 x 10" kg AX Vi t a t RE 6,4 x 10 m NA 6.02 x 10 /mole 2 a 400 2, a AX R 8.31 J/mole-K F.et m aart k 1.38 x 101 J/K W (work) F d Cos 0 P (power) W /t W.et KE KE. work-energy theorem I atm .01 x 10' Pa 1 gm/cm'- 10' kg/ m' P.E K.Er P.Er frd K.Ei AK.E P (momentum MV J (impulse)- F At AP Xom (mi xi m: x: y m, m. Conservation of momentum: M, vut M. V M Virt. M. V Via V Elastic collision: at ra UG -GM m/r

Explanation / Answer

Here ,

m = 20 Kg

F = 200 N

d = 5 m

a) normal force , N = 20 * 9.8 - 200 * sin(30)

N = 96 N

frictional force , f = 0.32 * 96 = 30.72 N

net work done = (200 * cos(30) - 30.72) * 5

net work done = 712.4 J

b)

let the speed is v

using work energy theorum

0.5 * 20 * v^2 = 712.4

v = 8.44 m/s

the speed of block is 8.44 m/s

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