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EXAMPLE2.4Acarstartsfromrest.Itsvelocitybecomes20 msin8 s.Finditsacceleration.EXAMPLE 2.4 A car starts from rest. Its velocity becomes 20 \mathrm{~ms} in 8 \mathrm{~s} . Find its acceleration.EXAMPLE2.4Acarstartsfromrest.Itsvelocitybecomes20 msin8 s.Finditsacceleration.
b)Whygravityistakennegativeforanobjectmovinginupwarddirection?b) Why gravity is taken negative for an object moving in upward direction?b)Whygravityistakennegativeforanobjectmovinginupwarddirection?
b)Howrepresentvectorquantitiesarerepresentedgraphically?b) How represent vector quantities are represented graphically?b)Howrepresentvectorquantitiesarerepresentedgraphically?
a)Definemotionundergravity?a) Define motion under gravity?a)Definemotionundergravity?
iv.Ifanobjectismovingwithconstantspeedthenitsdistance−timegraphwillbeastraightline.(a)alongtime−axis(b)alongdistance−axis(c)paralleltotime−axis(d)inclinedtotime−axisiv.If an object is moving with constant speed then its distance-time graph will be a straight line.(a) along time-axis(b) along distance-axis(c) parallel to time-axis(d) inclined to time-axisiv.Ifanobjectismovingwithconstantspeedthenitsdistance−timegraphwillbeastraightline.(a)alongtime−axis(b)alongdistance−axis(c)paralleltotime−axis(d)inclinedtotime−axis
EXAMPLE2.12Abicycleacceleratesat1 ms−2fromaninitialvelocityof4 ms−1for10 s.Findthedistancemovedbyitduringthisintervaloftime.EXAMPLE 2.12A bicycle accelerates at 1 \mathrm{~ms}^{-2} from an initial velocity of 4 \mathrm{~ms}^{-1} for 10 \mathrm{~s} . Find the distance moved by it during this interval of time.EXAMPLE2.12Abicycleacceleratesat1 ms−2fromaninitialvelocityof4 ms−1for10 s.Findthedistancemovedbyitduringthisintervaloftime.