Chapter 2 - Kinematics: Description of Motion - Learning Path Questions and Exercises - Exercises - Page 63: 61

a). For free fall, $v=u+at=0-gt=-9.8t\, m/s$ , we consider downwards to be negative. Graph is as shown. b). For free fall, $S=ut+\frac{1}{2}at^{2}=0-0.5\times 9.8t^{2}=-4.9t^{2}$ So, $y=-4.9t^{2}$. Graph is as shown.

a). For free fall, $v=u+at=0-gt=-9.8t\, m/s$ , we consider downwards to be negative. Graph is as shown. b). For free fall, $S=ut+\frac{1}{2}at^{2}=0-0.5\times 9.8t^{2}=-4.9t^{2}$ So, $y=-4.9t^{2}$. Graph is as shown.