The fulcrum of lever aocb is o. OA = CB = 40. OC = 30. OA vertical OC. OC vertical CB hangs 49 n object on A. B at least needs force to keep lever Ao horizontal. It has a direction of force A_________________ O l l l__________________ B C

The fulcrum of lever aocb is o. OA = CB = 40. OC = 30. OA vertical OC. OC vertical CB hangs 49 n object on A. B at least needs force to keep lever Ao horizontal. It has a direction of force A_________________ O l l l__________________ B C

Connect ob, Pythagorean theorem ob is 50, 40 times 49 divided by 50 to get 39.2n

After the Greek scientist Archimedes discovered the lever principle, he made the heroic words of "give me a fulcrum, I can pry the earth". If Archimedes applied a force of 600N at one end of the lever to move the earth with a mass of 6.0 × 1024kg, how many times should the length of the long arm be that of the short arm? If you want to pry up the earth by 1cm, how long does it take to press down one end of the long arm? If we press down at the speed of light, how many years? What's your inspiration after finishing the problem

The gravity of the earth is resistance g = mg = 6.0 × 1024kg × 10N / kg = 6.0 × 1025n. According to the lever balance condition, we can get f × L1 = g × l2600n × L1 = 6.0 × 1025n × L2, then L1L2 = 6.0 × 1025n600n = 1 × 10231, the power arm is 1 × 1023 times of the resistance arm

Why don't I understand the lever principle of junior physics

The problem of lever principle is to apply the same model, as long as you remember, force balance and moment balance are OK at any time
1. The sum of all upward components is equal to all downward components
2. Take a certain place as the fulcrum (the force at the fulcrum is ignored when calculating the moment), the moment of all upward forces is equal to the moment of all downward forces
Then simultaneous equations can be. Do more exercises, there must be a few, support you!

How to draw the lever theorem of physics in grade three? How to draw the distance between the power arm and the resistance arm? How to look at the power and resistance

First find the direction of the force, through the origin and perpendicular to the direction of the force