Question

An object starts from rest, accelerates uni-
formly in a straight line by acceleration 4
m/s2 for 4 s, then it moves with constant
velocity for 2 s and comes to rest by retar-
dation 8 m/s2. The total distance travelled
by the object is​

Answer 1

Answer:

s1 = 1/2at^2 = 1/2*4*4*4=32m

V=at = 4*4 = 16

S2 = Vt2 = 16*2 = 32m

V^2 = 2as3

s3 = 16*16/2*8 = 16 m

total distance = 32 +32+16 = 80 m