Question

i m cunfused plzz help... question 2 ,3 with explination step by step

Answer 1

2. Using equation of motion
v=u+at
a=(v-u)/t
a=(60-80)/5
a=(-4)km/ s hr

to convert in m/s²
multiply by (1000/3600) = (5/18)
a=(-4)x(5/18) m/s²
a=(-10/9)m/s²

3. v= u+at
(40x(5/18))=0 + a(10x60)
(200/18)/600=a
a=(1/54) m/s²