What would cause a feather to move more slowly than a brick through the air?
Well, it’s because the air offers much greater resistance to the falling motion of the feather than it does to the brick. The air is actually an upward force of friction, acting against gravity and slowing down the rate at which the feather falls. Air resistance causes the feather to fall more slowly.
What causes some objects to fall slower than others?
Galileo discovered that objects that are more dense, or have more mass, fall at a faster rate than less dense objects, due to this air resistance. Air resistance causes the feather to fall more slowly.
What force causes a leaf to fall more slowly than a penny?
air resistance
When the drag force on an object falling through the air equals the force of gravity the object has reached *?
terminal velocity
What is the force you have to overcome to start an object moving?
Study Guide – Force & Newton’s Laws
| Question | Answer |
|---|---|
| Which force do you have to overcome to start an object moving? | static friction |
| Whenever something is in motion, there is always _______ to oppose the motion. | reaction |
| Which law of motion states the relationship among force, mass, and acceleration? | Newton’s Second Law |
Does inertia depend on mass?
Inertia is that quantity which depends solely upon mass. The more mass, the more inertia. Momentum is another quantity in Physics which depends on both mass and speed.
What is difference between inertia and mass?
Inertia is the tendency of objects to remain as they are – either at rest or in motion. Mass, which is the amount of matter in an object is directly related to that object’s inertia.
What factors can decide the inertia of a body?
Factors that affect the moment of inertia
- The density of the material.
- Shape and size of the body.
- Axis of rotation (distribution of mass relative to the axis)
Does inertia depend on speed?
No, inertia does not depend on speed. Inertia solely depends on the mass. The more mass, the more inertia.
Why does speed affect inertia?
As you accelerate, your velocity increases and therefore mass will increase. The increase in mass will bring about an opposite force. The greater the mass, the greater the inertia.
What happens to inertia when speed is doubled?
There is no change in the inertia when the velocity is doubled. Inertia is dependent only on the mass of the object. When the velocity of the object increases the momentum will be doubled.
What is the difference between speed and inertia?
From here we can define velocity as speed with a direction tacked on; the ball was traveling at 90 m/s. Inertia, though, is the tendency for an object to keep traveling at a certain velocity (speed + direction) and resist any changes to its state of motion.
What is required to cause acceleration?
An object’s resistance to change in motion is only dependent on its MASS. An unbalanced force (or non-zero net force) is needed to cause acceleration.
Which has more inertia so need more force to move?
A more massive object has more inertia than a less massive object. Fast-moving objects have more inertia than slow-moving objects. An object would not have any inertia in a gravity-free environment (if there is such a place). Inertia is the tendency of all objects to resist motion and ultimately stop.
Do objects with more inertia roll faster?
You should find that a solid object will always roll down the ramp faster than a hollow object of the same shape (sphere or cylinder)—regardless of their exact mass or diameter. (Although they have the same mass, all the hollow cylinder’s mass is concentrated around its outer edge so its moment of inertia is higher.)
What is faster rolling or sliding?
Since the sliding object has no angular velocity, its linear velocity is greater than that of the rolling object, and it reaches the bottom of the track faster.
Do heavier objects slide faster?
So they will not cancel each other. There will be a resultant force which will be proportional to the mass of the object. Hence an object with greater mass feels greater force than the other one. So even if the slope is same for both objects, a massive object moves faster through the slope than a less mass object.
Who will come down a slide the fastest a heavy person or a light person?
The level of friction between two objects that come together depends on the surface. The rough surface exerts more friction on an object than the smooth one. The heavier body moves faster and has higher friction than the smaller body. So, the heavier will go down the slide faster than the lighter body.
Do lighter or heavier objects move faster?
Answer 2: No, heavier objects fall as fast (or slow) as lighter objects, if we ignore the air friction. The air friction can make a difference, but in a rather complicated way. The gravitational acceleration for all objects is the same.