Question

Given alongside is the velocity-tine graph for a moving body :

Figure

Find : (i) Velocity of the body at point C.
(ii) Acceleration acting on the body between A and B.
(iii) Acceleration acting on the body between B and C.

Answer 1

(i) BC represents uniform velocity. So velocity of the body at point C is $\boxed{40\mathrm{km}}$
(ii) Acceleration = Slope of line AB
$$\begin{gathered} =\frac{(40-20)}{(3-0)}\mathrm{km}/{\mathrm{hr}}^2 \\ =\boxed{6.66\mathrm{km}/{\mathrm{hr}}^2} \end{gathered}$$
(iii) BC represents uniform velocity, so, acceleration acting on the body is zero.