Gravity !
Lift
In mechanics, the force exerted upwards by the surface that a body sits on is equal and opposite to the force exerted downwards by that body and is referred to as the Ground Reaction Force (GRF) or simply Reaction.
about 6.5 milinewtons
Welll...... when you jump... you leave the ground... when you walk.... you dont.... unless your klumsy.... or if youre jump walking....
In order to walk from 15 below ground to 45 above ground, you have to climb a total of 60 floors.
It enables us to move because of the gravity :) <3
Gravity,contact force, friction, air resistance
The net force that enables an object to accelerate is a force greater than zero.
It is hard to walk on sand as - first we need to understand how we walk. every action has an equal opposite reaction (i.e. when we walk on earth we put a certain amount of force on the ground that reverts that force back on us) but when we walk on sand it is not hard and soft we fall into it and it doesn't give us and EQUAL opposite reaction.
Friction, as we push ground the tangential component of the normal force that is friction (is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other) pushes us forward (newtons third law) helps us to move forward and walk.
gravity and friction...
enables lobsters to walk you nub
Lift
the concept's application here is very simple. As we walk we exert a certain amount of force on the Earth and governed by the 3rd law the Earth exerts the equal amount of force back on our foot (opposite direction) but as the Earth is very massive to observe the push that we exert only the force the it exerts it felt this added to friction provides the stability of the feet while in movement
Adhesion and Cohesion or cohesive attraction or cohesive force
The duration of Ground Force is 1800.0 seconds.
The motion force