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A stone is projected horizontally with 20m/s from top of a building . Calculate its position and velocity after 3 seconds neglecting air resistance
Since, body is projected horizontally with a velocity of 20m/s.ux = 20m/sax = 0So, vx = 20m/s for all time.Along vertical axis,uy = 0t = 5ay = 10m/s2vy =?vy = uy +ayt=> vy = 0 + 10*5= 50m/sSo, magnitude of velocity of body after 5s√{(50)²+(20)²}m/s=√2900 m/s=53.851 m/s= 54 m/s (approx)
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