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How does the weight of a falling body compare with the air resistance it encounters after it reaches terminal velocity?
If its speed of fall is no longer changing, then its acceleration is zero. That tells you that the forces on it must be balanced, so the upward force of air resistance must be exactly equal to the downward force of gravity.
How do the terminal velocity of two objects compare if they both have the same mass but one has a larger surface area?
The object with the larger surface area will experience a higher air resistance force, leading to a lower terminal velocity compared to the object with a smaller surface area of the same mass. This is because the larger surface area increases the frictional force acting against the object's motion.
How do the resistance and the weight of a falling object compare when terminal speed is reached?
Air resistance doesn't change with weight. It changes with speed and shape. More speed, more air resistance. If the shape has a lot of surface are to drag the air, it is more resistant, but this factor does not change with weight or speed. This is why terminal velocity is possible. As the object falls, its speed increases, so its resistance increases also, because resistance depends directly on speed. But as this resistance is increasing, the gravity is staying the same. So, eventually, resistance catches up with gravity and cancels it out, causing an end to acceleration, or constant speed.
What force exert by parachutes?
Drop any object from a plane and the downward force due to the mass will eventually be matched by an upward force due to air resistance (terminal velocity). This terminal velocity depends on the objects drag coefficient, what the parachute does is present a drag coefficient sufficient to give the required terminal velocity for landing . > You need no more than say 6 metres / second landing velocity, effectively this is the terminal velocity with the chute open. Using body mass of 80 kg and acceleration due to gravity of 10 (m/s)/s, this gives a downward force of ( 80 * 10 ) 800 newtons. To balance this at landing velocity, you need a drag coefficient calculated from: 800 = velocity2 * drag coefficient , so: drag coefficient = 800 / velocity2 = 22.22 > Compare this to the pre chute deployment velocity of around 80 metres / second, giving a drag coefficient of: drag coefficient = 800 / 6400 = 0.125
How does the direction of momentum compare to the direction of velocity?
Momentum is a vector quantity that is proportional to velocity. The direction of momentum is the same as the direction of velocity, but momentum includes the mass of the object in addition to its velocity.
How does the weight of a falling body compare with the air resistance it encounters after it reaches terminal velocity?
If its speed of fall is no longer changing, then its acceleration is zero. That tells you that the forces on it must be balanced, so the upward force of air resistance must be exactly equal to the downward force of gravity.
How will the upward force of air resistance compare to the downwward pull of gravity?
Assuming that you're referring to an object that is accelerating towards a massive body by means of gravitational attraction... When the force of frictional air resistance equals the opposing force of gravity, the net force on the object equals zero, and acceleration will cease. It is called terminal velocity, and the object will remain at this velocity until some new event happens.
How does the force of gravity on a raindrop compare with the air drag it encounters when it falls at a constant velocity?
If the vertical speed is constant, that means there is zero vertical acceleration. If the vertical acceleration is zero, that means the net vertical force on the object is zero. If the net vertical force on the object is zero, that means the downward force (weight) and upward force (air resistance) are equal.
How do the terminal velocity of two objects compare if they both have the same mass but one has a larger surface area?
The object with the larger surface area will experience a higher air resistance force, leading to a lower terminal velocity compared to the object with a smaller surface area of the same mass. This is because the larger surface area increases the frictional force acting against the object's motion.
How do the resistance and the weight of a falling object compare when terminal speed is reached?
Air resistance doesn't change with weight. It changes with speed and shape. More speed, more air resistance. If the shape has a lot of surface are to drag the air, it is more resistant, but this factor does not change with weight or speed. This is why terminal velocity is possible. As the object falls, its speed increases, so its resistance increases also, because resistance depends directly on speed. But as this resistance is increasing, the gravity is staying the same. So, eventually, resistance catches up with gravity and cancels it out, causing an end to acceleration, or constant speed.
What force exert by parachutes?
Drop any object from a plane and the downward force due to the mass will eventually be matched by an upward force due to air resistance (terminal velocity). This terminal velocity depends on the objects drag coefficient, what the parachute does is present a drag coefficient sufficient to give the required terminal velocity for landing . > You need no more than say 6 metres / second landing velocity, effectively this is the terminal velocity with the chute open. Using body mass of 80 kg and acceleration due to gravity of 10 (m/s)/s, this gives a downward force of ( 80 * 10 ) 800 newtons. To balance this at landing velocity, you need a drag coefficient calculated from: 800 = velocity2 * drag coefficient , so: drag coefficient = 800 / velocity2 = 22.22 > Compare this to the pre chute deployment velocity of around 80 metres / second, giving a drag coefficient of: drag coefficient = 800 / 6400 = 0.125
How do you compare velocity and speed?
Velocity is a vectorial quantity, speed with a direction.
How does the direction of momentum compare to the direction of velocity?
Momentum is a vector quantity that is proportional to velocity. The direction of momentum is the same as the direction of velocity, but momentum includes the mass of the object in addition to its velocity.
Who does the weight of an non-free fall opject compare with the air resistance when it is in its termenal speed?
In an object in terminal speed, the weight of the object is equal to the air resistance acting on it. This balance of forces allows the object to fall at a constant speed, as the downward force of gravity is exactly countered by the resisting force of the air.
Compare the sizes of forward force and air resistance while a car is moving at 30mph?
when a car is speeding up how does the forward force and air resistance compare
How does the potential difference across the bulb in a flashlight compare to the terminal voltage of the batteries used to power the flashlight?
The potential difference across the bulb in a flashlight should be slightly lower than the terminal voltage of the batteries used to power the flashlight. This is because there is a small internal resistance in the batteries which causes a voltage drop across it.
Is it possible for an object to have zero velocity?
Zero relative velocity to another object, sure no problem. Zero absolute velocity, not possible as there is no absolute reference to compare to.
