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Mass?
Mass is both a property of a physical body and a measure of its resistance to acceleration.
What is the relationship between air resistance and the acceleration of falling objects?
As an object falls towards the earth, it accelerates due to the force of gravity acting on it's mass. As velocity increases, air resistance increases. This is in the opposite direction to the force of gravity on the object. Therefore the resultant force on the object is decreased, and the rate of acceleration is reduced. Eventually, the force due to the air resistance is equal in magnitude to the weight and the object has no resultant force acting. At this point the object will be travelling at a constant velocity, commonly referred to as Terminal Velocity.
When an object is falling at terminal velocity what is the net force acting on the object?
Zero. "Terminal velocity" means that the object is no longer accelerating; the downward force of gravity and the upward force of resistance are in balance.
How does the shape of an object affect how fast it falls?
Different shapes result in different resistances (force opposing gravity) on the object as it falls. An object will continue to accelerate as it falls, until the gravitational force is equivalent to this resistance. This is known as "Terminal Velocity." The lower the resistance is, the higher the resulting speed will be before this equilibrium is reached. An object with a large surface area or volume (high wind resistance value) and low density (low gravitational force) will fall slower than an object that has a lower surface area (low wind resistance) with a higher density (high gravitational force). e.g., A large hollow Styrofoam ball will fall much slower than a metal dart.
What two factors does acceleration depend on?
Acceleration depends on both the magnitude of the net force acting on an object and the mass of the object. The greater the net force applied or the lower the mass, the greater the acceleration of the object.
What two things does the amount of air resistance acting on an object depend on?
The amount of air resistance acting on an object depends on its speed (faster speeds result in greater air resistance) and its surface area (larger surface area increases air resistance).
What factors affect the amount of air resistance acting on an object?
shape, size, and speed
What three factors affect the amount of air resistance acting on a object?
The factors that affect the amount of air resistance acting on an object are the speed of the object, the surface area exposed to the air, and the shape of the object. A faster object experiences more air resistance than a slower one, a larger surface area increases air resistance, and a streamlined shape reduces air resistance.
What three factors affect the amount of air resistance acting on an object?
shape, size, and speed
What are the forces acting on a falling object on earth?
Gravity and air resistance.
What is the force acting on a fallling object?
Usually gravity AND air resistance.
The two force acting on falling object are gravity and?
air resistance.
Is this statement true or false when the only force acting on a falling object is air resistance the object is said to be in free fall?
No, that is false. "Free fall" means that the only force acting on an object is GRAVITY. Specifically, there may be no significant amount of air resistance. It's not quite possible for the only force acting on an object to be air resistance, since you can't really eliminate the effect of gravity. Though, if the object has the same density than the liquid or gas in which it is placed, the gravity may be cancelled for practical purposes.
What affects the amount of force needed to move an object?
The amount of force needed to move an object is affected by its mass, the surface it is moving on, and any friction present between the object and the surface. Additionally, the presence of any external forces acting on the object, such as gravity or air resistance, can also impact the amount of force required to move it.
What 3 factors affect the amount of air resistance acting on an object?
Speed, shape and frontal cross-section. Viscosity, texture, friction, gravity, velocity, size, and shape can all affect air resistance.
Mass?
Mass is both a property of a physical body and a measure of its resistance to acceleration.
What are the forces acting on an object falling through the air?
Air resistance and gravity.
