How to do it

1. This question has three test points:
first, the free falling time of 100 mm height:
t = (2 h / g) ^ 1 / 2
Second, the free falling speed of 100 mm height:
V = GT
third, the maximum bearing capacity of the test object at the moment = the weight of the weight of the code 25 kg * the free falling speed of 100 mm height / the impact time of the test object

2. The so-called internal force is the force that can be offset by the integral method
the internal force is relative to the external force

for example, if you consider the force of an object in the period,
the friction force is the external force of that object,
if you look at the two objects as a whole,
friction is internal force
(try drawing stress analysis diagram)

3.

this is the shape of an arm. The left hand is the hand. When working, the arm needs to be bent to have strength. We can try what's the difference between stretching arms and bending arms to get things. It's easy to see that this curved arm is more powerful. Let's see how to write the word "Li": Pai is two fingers, and the horizontal hook is finger, palm and bent arm

Video: Web links

5. Mark it and pass it on

6. 122kg -
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What's your bullshit?
if you can hit more than 100kg with one punch, then people of the same age are basically flying with one punch< The machine for measuring boxing force is very irregular
it measures resistance and converts it into strength
you push hard at that target, but it's still high in the end
I played that machine a few days ago
it's not allowed at all
I've practiced Taekwondo and classical wrestling in my mixed sports school
I've practiced strength all day long
it's only in my 20s when I hit a fist
there are more than 300 children next to me who climb up to push it
all
more than 300 < br />Are you sure?