Question

starting from a stationary position an object attains velocity of 6m/s in 30s. then it changes its velocity to 4m/s in 5s. calculate the acceleration

Answer 1

Here given,,
u=6m/s
v=4m/s
and, t =5 s
now we know that
a=v-u/t
therefore,
a=4-6/5
= -2/5
= -0.4

so,a =-0.4 m/s^2