A stone is drop from a height of 20m. How much time it will take to reach the ground ? and what will be its speed when it hits the ground?
Answers
Answered by
1
h = 20 m( let h=d)
t= ?
g= 10 m/s ( approx)
WKT
d = s * t
t= d / s
t= (20 /10)s
t=2 sec
Answered by
0
hello mate here is ur answer
given: h=20m
t=?
v(final velocity)=?
u(initial velocity)=0 and
g=9.8ms^-2
hence we have the formula
h=ut+1/2gt^2
h=1/2gt^2. since u=0, ut=0
20=1/2×9.8×t^2
20×2=9.8×t^2
40=9.8t^2
40÷9.8=t^2
4=t^2
t= 2s,. therefore t=2s
, since we have another formula
v=u+gt
v=gt, since u=0
therefore v= 9.8×2= 19.6 ms^-1
hence the above are the value of velocity
and time
##########be brainly################$
given: h=20m
t=?
v(final velocity)=?
u(initial velocity)=0 and
g=9.8ms^-2
hence we have the formula
h=ut+1/2gt^2
h=1/2gt^2. since u=0, ut=0
20=1/2×9.8×t^2
20×2=9.8×t^2
40=9.8t^2
40÷9.8=t^2
4=t^2
t= 2s,. therefore t=2s
, since we have another formula
v=u+gt
v=gt, since u=0
therefore v= 9.8×2= 19.6 ms^-1
hence the above are the value of velocity
and time
##########be brainly################$
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