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2. A particleP ofmass0.6kg is releasediom restandslidc''"i i -"tit "r""". Theplani s inclinedat 30"to thehoiizot" .p".5 fJ. t Civenthat tiction s theonlynon-graonP, fiod(a) the workdoneagainstrictionas he specd fP incre

(b) thecoefficientof frictior betweeoheparticleand he

\9'9t?c

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A triangular tame s formedby cuttinga unifom rod into 3

Gs)l2 cm9g

Figure

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A carofmass750kg is movingup a straightoad ncline. - L ^ ,where in d : -. Thc rcsistancco motionof thecar romconsta[tmagnitude newtons. hepowerdevelopedy thcar s movingat a constant peed f20 ms-1.(a) ShowhatR:260.

Thepowerdevelopedy thecar'sengines now ncreaseresistarceo motion rom non-gravitationalorces emaithecar s movingup the oadat 20 ms I the car'saccele(b) Find hevalueof a.

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lln lhis question {tnd areperpendicularunil vectors n aA ballofmass0.5 kg is frovingwith velociq/ 10i+ 24j) mlmmediately fter he mpact heball s movingwith velocFind(a) the magnitude f the mpulse f the baa n theball,

(b) the size of the angle betweenhe vcctor i and the impball,

(c) the knetic energy ost by the ball in the impact.

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ln5

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8. A smallball,! ofmass 3z is moving with speed in a straitablc.The ball collidesdirectly wiih anothersmall ball B o& towards alolg the samestraight i[e. The coefficientois I. The balls have he same adiusand canbe modelleda

(a) Find(i) the speed fl immediately fter hecollision,(ii) the speed f B immediately fler hecollision

Afterthe collisionB hitsa smoolh erticalwall which spmotionof B. The coellicient of restitutionbetween Band

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so r^l"on6) fi,h!{* , }4Pa.nt t.l*.splrfoga.E +S t

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