Q.15. An objects starting from rest travels 30 m distance in rst 2 sec and next 150 m in next
4 sec. What will be velocity after 7 sec from the start?
Answers
Answered by
7
Answer:
From s=ut+
2
1
at
2
In first 2 s,
s=20m
20=
2
1
a(2)
2
=2a
a=10 m/s
2
Velocity at the end of 2 s is
v=u+at=0+10×2=20m/s
In next 4s, s=ut+
2
1
a
′
t
2
160=20×4+
2
1
a
′
(4)
2
80=8a
′
a
′
=10 m/s
2
It shows that acceleration is uniform. From v=u+at
v=0+10×7=70 m/s
Answer:70
Explanation:
plzz like my answer
Answered by
0
Answer:
your questions answer is 70
Similar questions