Correct. More specifically, the air pressure is higher at the bottom of the balloon than at it's top, since air pressure decreases as height increases. This gives a net upward force, that we call buoyancy, which can be greater that the downward gravitational force.DaleSpam said:Air pressure
Gravity allso pulls on the air around the balloon(which is air pressure) but because the air is more dense(it weighs more) than the helium in the balloon, the balloon rises.As the balloon rises, the force of gravity pulls on the balloon, but which force is strong enough to pull the balloon up so that it floats in the air?
thanks
Newton's laws of motion are a set of three physical laws that describe the behavior of objects in motion. The first law, also known as the law of inertia, states that an object at rest will stay at rest and an object in motion will stay in motion unless acted upon by an external force. The second law states that the force applied to an object is equal to its mass multiplied by its acceleration. The third law states that for every action, there is an equal and opposite reaction.
Newton's laws of motion and his law of universal gravitation are closely related. According to the law of universal gravitation, every object in the universe is attracted to every other object with a force that is directly proportional to their masses and inversely proportional to the square of the distance between them. This force of gravity follows the same rules as the second law of motion, with mass and acceleration playing a key role.
Mass is a measure of the amount of matter in an object, while weight is a measure of the force of gravity acting on an object. In Newton's laws, mass is used to calculate the acceleration of an object, while weight is used to calculate the force of gravity acting on an object. Mass remains constant, but weight can vary depending on the strength of the gravitational force.
Yes, Newton's laws and the law of universal gravitation can be applied to objects in space. In fact, these laws were first developed to explain the motion of celestial bodies such as planets and moons. The laws still hold true in space as long as there are two objects with mass that are interacting with each other through gravitational force.
Newton's laws and gravity play a crucial role in our everyday lives. They explain how objects move and interact with each other, from the motion of a ball being thrown to the orbit of planets around the sun. Without these laws, we would not be able to understand or predict the behavior of objects in our world. Their applications can be seen in fields such as engineering, transportation, and sports.