What would you like to do?
What do we call the motion of a body when only the force of gravity is acting on the body?
The forces are vectors, the vectors are added together, therefore forces acting against each other will cancel each other out, forces acting in the same direction will add up.… For forces acting in different directions you can use Pythagorean theorem to add them up. The sum is what gives the body an acceleration, depending on it's mass. ( F=m*a )
If a body is at rest ... or traveling at a constant speed in a straight line ... there could well be millions of forces acting on it. The only conclusion you can draw from the… fact that it has no acceleration is that all the forces acting on it must add up to zero.
No, because since it is in equilibrium it has to have at least gravity and normal force. so it would have to have 2 forces at the least, and they would have to cancel each oth…er out. Like a box on the floor is in equilibrium, Force of gravity pulling down and normal force pushing back up. (if it didnt have normal force then gravity would pull it under)
When one body exerts a force on another body, the other body exerts an equal and opposite reaction force. Both bodies gain equal and opposite momentum due to the forces. The m…omentum gained by a body due to the action of a force on it a force is given by the integral of the force with respect to time over the time period that it acts. In less mathematical terms, the momentum gained is dependant on how the strength of the force changed over the time it acted and also how long it acted for. How much the two bodies move as a result is dependant on their respective masses. If a body has momentum, p, and mass, m, then it's velocity, v, due to that momentum is given by v=p/m, so the larger a body's mass, the smaller its velocity for a given momentum and the smaller it's mass, the greater its velocity. If the two bodies have similar masses, they will move in opposite directions with similar speeds; For example, two billiard balls colliding. However if one body has a much larger mass, it will move much less than the smaller body. An example of this would be doing a pushup; You exert a force on the Earth and it exerts an equal and opposite reaction force on you. You both gain the same amount of momentum from the pushup but, because the Earth's mass is so much greater than yours, you move up a noticeable amount while the Earth barely moves down at all.
It is called the 'moment of the force'.
If the force of gravity acts on all bodies in proportion to their mass why does not a heavier body falls faster than a lighter body?
Because, in non-technical terms, inertia accompanies mass as well as gravity. Along with an increased mutual pull, the bodies have a tendency to remain at rest. The larger the… mass, the more energy is required to overcome the inertia. Here is a non-technical way to visualize this and have it make, perhaps, a little more sense. If I am standing on earth in a vacuum (I'll be wearing my handy pressurized suit) and I'm holding a 10 kg mass and a 1 kg mass, I might intuitively guess that the 10 kg mass will fall faster to earth. But let me imagine that I am standing on earth at the exact opposite position on earth, my antipode. I'll assume there is land there. I see myself 'upside down', holding on to the same weights. It's now a little more intuitively clear that while the gravitational 'pull' between the earth and the 10 kg mass is a little stronger, the earth has to pull 'up' on a slightly more massive object. From this position one could playfully imagine that it would be the less massive object that would be pulled 'up' faster. Of course this is not the case, but you can see how a different perspective can alter the way we make inferences about things.
No. For a body to be in equilibrium it must be acted on by either no forces, or by several forces such that their vector sum (the net force) is zero. -- This was my original… post, Silverbullet89, I just forgot to sign in first... But dont you think that when we sit, then a single fore weight acts on it???
A rapidly spinning body has energy though no external foces are activly acting upon it. In addition E=mc2 so there is a lot of energy tied up in the body's mass.
Either no force at all, or else a group of forces whose vector sum is zero ... often known as a 'balanced' group of forces.
weight force acting vertically downward & normal reaction force acting vertically upward
If the only force working on an object is the force of gravity then the object in question is considered to be in free fall. On a technical note: the measurement of the grav…itational force has to be made by a non-free falling observer because objects in free fall experience no gravity themselves. For example, I can measure the force of gravity on a ball that is falling down (neglecting air resistance) because I am not free falling myself (my feet are pushed upwards by electromagnetic repulsion between the atoms in my feet and those in the ground beneath me). The ball however just sees the Earth accelerating towards it, but feels no gravity itself.
zero velocity =)
This is according to newton's II law of motion
When the net force that acts on a body is zero the forces are balanced this represents a condition called?
No. A free body diagram includes ALL the forces that act on a body. Typically, this may involve gravitation, friction, centripetal forces, elastic forces, electrical and magne…tic forces, a push by some sort of engine, etc.