Solve graphically. A body starting from rest is moving with an acceleration of 3 m/ s² After 10 s, it continues to move with zero acceleration for 20 more seconds. It then retards and comes to a stop within the next 5 seconds. Find its total displacement. [3 MARKS]

Join BYJU'S Learning Program

The displacement of a body in 8 s starting from rest with an acceleration of 20 cm/s2 is

The correct option is C 640 cmGiven acceleration = 20 cm/s2=0.20 m/s2 Using second equation of motion, we know S=ut+12at2 At t=0, body is at rest ∴u=0 ⇒S=12at2=12×(0.2)(64) =6.4 m=640 cm

The displacement of a body in $8 s$ starting from rest with an acceleration of $20 c m / s^{2}$ is

The correct option is C $640 c m$
Given acceleration = $20 c m / s^{2} = 0.20 m / s^{2}$

Using second equation of motion, we know
$S = u t + \frac{1}{2} a t^{2}$
At $t = 0$ , body is at rest
$∴ u = 0$
$\Rightarrow S = \frac{1}{2} a t^{2} = \frac{1}{2} \times (0.2) (64)$
$= 6.4 m = 640 c m$