What happens if forces are balanced

So the only force I have acting on the rock right now is the force of gravity, acting downward. We're assuming we're not going to think too much about-- Actually let's think about it a little bit, let's also put, so let's put it That's 5 N down. But I have some air resistance here. You can view it as the force of friction of the air, and let's say that is 1 N up.

This is the force of friction or you can call it air resistance. As if this thing bumps into all of the air particles as it is falling to the ground. The last scenario I'll draw with the rock again as that seems to be the theme of the video.

The last scenario, that's the ground. The rock is resting on the ground. So I have the force of gravity, 5 N downwards. The rock is being supported by the ground, 5 N upwards. And now this guy is pushing really hard.

So now he's applying 4 N in that direction. You have 2 N from the force of friction, I won't that draw just yet; and you also have another character right over here, who is trying to keep this guy from pushing the rock.

So he's pushing in the other direction at 1 N. So you have 2 N of the force of friction. You have this guy pushing 1 N against this guy's motion to the left, so between this guy and the force of friction, you have 3 N going left. So now I'll let you think about which of these have an unbalanced force in them, or another way to think about it, which of these have a Net Force going on? So let's look at the first scenario, we have a 5 N force of gravity acting towards the centre of the earth.

These have the same magnitude in the exact opposite directions so they cancel out. These forces completely balance each other out. There is zero net force going on, there are no forces the way I've drawn it, going on in the horizontal direction.

So you have zero net force, these right here are balanced. We would not consider this one of the scenarios we see an unbalanced force. Let's go to scenario 2. Once again, 5 N up and 5 N down, they are balancing each other. Then in the horizontal direction, this guy is pushing of 2 N to the right is being completely balanced by the force of friction of 2 N to the left. Because they're balanced there is no net force and this rock isn't going to accelerate.

So once again these are all balanced forces or there's no net force going on right over here. In scenario 3. Once again, in the vertical direction. The force of gravity is being balanced by the normal force of the ground. Keeping the rock from plummeting or accelerating towards the centre of the earth. Why is it then that when we are standing on the Earth that we are not moving?

The answer is that the Earth is pressing on us with the same force that we are exerting on it. Balanced forces :. Balanced forces are those that are opposite in direction and equal in size. Balanced forces are considered to be in a state of equilibrium. Combined forces that are balanced are always equal to zero. A balanced force keeps an object moving at a constant velocity.

Newton's 1 st Law of Motion What are some balanced forces in the room? A book on the table is an example of a balanced force. The force exerted by each person is equal, but they are pushing in opposite direction, in this case together. It would look something like this give in the picture above. Because the force that each of the person is exerting is equal, the two forces cancel each other out and the resulting force is zero. To determine if the force acting upon the object are balanced analysis for the force must first be conducted to determine what forces are acting upon the object and in what direction.

If two individual forces are if the equal magnitude and opposite direction, then the force is said to be balanced. What Happens When Forces are Balanced? When two forces acting on an object are equal in size but act in opposite direction, then that is said to be the balanced force. If the forces on an object are balanced a moving object continues to move at the same speed an in the same direction. What is the Effect of a Balanced Force on a Body?

A force that does not change the state of rest or motion of an object is a balanced force. So a balanced force does neither make a body at rest to move nor make a body in motion to come to rest.

It does not allow a body in motion to even change its direction or increase its speed too. Hanging Objects:. In the above picture the weight of the bulb shade pulls down and the tension in the thread pulls up. The forces pulling up and pulling down can be said to be in balance.

Floating Objects:. In the above picture, the log is floating in the pool of water. It is floating because the weight of the log is balanced by the up raise from the water. If more weight is tied to the log, the force that is pulling it down may be more and will cause it to sink. In the above picture, a metal block is seen resting on the surface of a table.

The weight is balanced by the reaction force from the surface. As seen in the picture there are two forces acting upon the book. The other force pushes of the table on the book referred to as normal force pushes the book upward.

Since these two forces are of equal magnitude an in the opposite direction, they balance each other. The book is said to be in equilibrium.

There is no unbalanced force acting upon the book as shown in the picture above and thus the book maintains its state of motion. The greater the mass of a body, the greater will be its inertia and the greater will be its resistance to changes to its state of motion or rest. A body at rest implies that the net resultant force applied on the body is zero. However, it is not necessarily that there is no force acting on the body. In the above-given picture, a box is seen resting on a table has zero net resultant force.

But there are two forces acting on the box given above. One of the forces is the gravitational force due to the weight of the box, while the other is the normal force. The normal force is an external force exerted perpendicularly by the surface in reaction to anybody placed against it. Role of Friction:. The friction can be explained with the example of a shopping cart and how it is not balanced.

If a shopping cart gave a good push and let go, it does not go in a constant velocity forever. After a while the shopping cart you are no longer touching it to apply an unbalanced force. The ground has friction applies a force to the shopping cart to slow it down to a stop. So the shopping cart is not really an example of balanced forces.

The Resultant Force and Balanced Force:.