- 1 2H= 2GT ...0,25Đ-H V= ( ,4 25−T) ...0,25Đ-T=4S...0,25Đ-H=80M...

bài 2. - DAP AN 214
DAP AN 214

Bài 2.

-

1

2

h= 2gt

...0,25đ

-

h v= ( ,4 25−t)

...0,25đ

-t=4s...0,25đ

-h=80m...0,25đ.