A stone is protected particaly upward from the ground with a speed of 20m/sec . How high dose it take? How much time dose it take?
Answers
Answered by
1
time = 4 sec
h max = 400\2*10=20 m
Answered by
2
Explanation:
initial velocity ,u=0
final velocity,v=20m/s
height,h=?
time,t=?
gravitational,g=9.8m/s square
according to third law
v square=u square +2gh
20×20=0×0+2×9.8×h
400=19.8h
h=400×10/198=20.2m
v=u+gt
20=0+9.8×t
t=20×10/98=2.04
Similar questions