Question

Solve this..please .....I need it urgently

Answer 1

given that x= -2t^3+3t^2+5 
by Diffrentiation,
dx/dt=-6t^2+6t
v=-6tA2+6t

Check when velocity is zero -6tA2+6t=0
 t=t^2 
Velocity is Zero at t=0 and t=1s.. again after Diffrentiation of velocity-time function dv/dt=-12t+6
 a=-12t+6 put t=0 and t=1s
 at t=0; a=6m/s^2
 at t=1; a=-6m/s^2