11. A stone is drop from the edge of a roof.
(a) How long does it take to fall 4.9 m?
(b) How fast does it move at the end of that fall ?
(c) What will be its acceleration after 3 seconds ?
Answers
Answered by
0
Answer:
h = 19.6 m
u = 0
h = u t + 1/2 g t * t
19.6 = 0 + 1/2 * 9.8 * t * t as g = 9.8 m/s/s
t = 2 sec. it takes 2 sec.
acceleration is always the same : g = 9.8 m/sec
velocity / speed at t = 2 sec is = u + g t = 0 + 9.8 * 2 sec = 19.6 m/sec
Similar questions