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##### d) If a body is thrown up ward with vertical velocity 50 \mathrm{~ms}^{-1} . Calculate maximum height which body can reach.

EXAMPLE 2.4 A car starts from rest. Its velocity becomes 20 \mathrm{~ms} in 8 \mathrm{~s} . Find its acceleration.

b) Why gravity is taken negative for an object moving in upward direction?

b) How represent vector quantities are represented graphically?

a) Define motion under gravity?

iv.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-axis

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.