Question

An object starting from rest covers 20m in first 2 seconds and 160 m in next 4 seconds .what is its velocity after 7 seconds from its start.

Answer 1

Answer:

for first part

u=0

t=2

s=20

20=0.5a4

a=10

for second part

s =160

t =4

a =10

v =u +at

v =70