ans. 340 00lb, 10 000 lb, 31 000lb
because it makes the force make bigger and does notmove
It sounds like an inclined plane
When you stand on a floor, the force that you exert on the floor because of your weight is equal to the force with which the floor supports your weight.
triangle
The floor is a stationary object (in relationship to you). The floor will provide only enough force to match the force of gravity holding you down. It has to be equal.
Because your feet are not accelerating, the force exerted by the floor upon your feet must be exactly the same as the force exerted by your feet on the floor. If you are standing, the amount of force exerted by your feet, and thus the amount of force exerted by the floor, is equivalent to your weight.
The floor must exert a force equal to that of the force exerted on the desk from gravity. This force is called a "normal force"
150 lbs. In order for the floor to support you it must resist an equal force.
Yes, the force exerted by the floor on our feet is equal to the force that our feet exerted on the floor, or it just depends on your weight, If you are heavier than the normal. When you stand, the longer the time you stand, the more pain you feel on your feet. And we can't be move upward by the force that the floor exerted on our feet because of the force of our weight that keeps us on the ground, and also because of gravity.
This involves Newton's third law of motion; for every force there is an equal and opposite force. If your weight is 140 lbs, then you're exerting 140lbs of force on the floor. In response, the floor is exerting 140lbs of force on you.
Yes
If you push down on the floor with a certain force, then - by Newton's Third Law - the floor will push up against you, with the same force. For instance, say you have a mass of 70 kg. In that case, your weight will be (roughly) 700 newton. If you stand on the floor, you will push down with a force of 700 N; and the floor will of course push back up, with the same force.