Fill in the blanks in junior high school physics urgently. . On site, etc. .

You too. . . Uncle, take you there! ! Questions 3-6 are easy to answer. Here are questions 7 and 8:

7. Can do 400 joules of work per second.

8.( 1) Test your strength by the speed at which you overcome your own gravity.

(2) own quality, climbing height, climbing time, gravity constant g (don't measure this! )。

(3) Platform scale or weight scale, tape measure and stopwatch.