5. A stone is thrown vertically up word from the top of a tower with a velocity of 5ms-1.
It reaches the ground after 8 s. Find the height of the tower.
forences between thermoplastics and thermosetting plastics with one
Answers
Answered by
1
Answer:
here is your answer mate !!
Explanation:
Given, initial velocity, u=5ms −1
Final velocity, v=0
Since, u is upward & a is downward, it is a retarded motion.
∴a=−10ms −2
Height attained by stone, s=?
Time take to attain height, t=?
(i) Using the relation, v 2 −u 2
=2as, we have
s=v 2 −u
2 /2a =(0)
2 −(5)
2 /2×(−10)=1.25m
(ii) Using the relation, v=u+at
0=5+(−10)t or
t=5/10=0.5s
Similar questions