Question

answer 4 and 5 please

4. For free fall, v; -o, time of fall = .015 s; from what height the ball fell? 5. For an inclined plane, e - 20". what is coefficient of static friction,

Answer 1

From data Initial relocity Vio Time of all t-OUBS 0.0LS3 Herght of the batt ge ? We have displacement eon. Se vit + lat where a in deceleration due to gravity = 9.8 m/s Put all values in above can. 3. (0) C0.015) + (-4.8.) C0.015) (negative Sign is because bettin fatting towardo earth

sao-0.001103 52 -0.001103 m . The ball fallo from a height of 0.001103 m H Let us represent the question in figure Normalfa mgsind O Friction forcalf mgcos 200 20°ma In fig ng is weight of object masın po' and mocon20° are its component Fid friction force opposite to the body motion from fig we can know that Friction force .mg Sin 20° Femgsin 20° -30) [. They are opposite and equah] Algo Normat Force 2 mg cospoo 2 mg cod 20°_@

Age It they are apposite and equal ? Divide both eq" & and Es mag Sin 20° N img caogao WKT Sino tano con F = tano = 4an 20° By defonition of co-efficrent of frictron E = Mgz co-efficient of friction Mg: tanpoo 0.3639 - co-efficient of friction

The problems 4 and 5 are solved and explained in the

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