What will happen to the plane if the wind velocity decreases to 25 m s toward the west?
What will happen to the plane if the wind velocity decreases to 25 m/s toward the west? The plane will move east more quickly.
Which requires more work — lifting a 50 kg sack vertically 2 mm or lifting a 25 kg sack vertically 4 mm?
Which requires more work- lifting a 50-kg sack a vertical distance of 2 m or lifting a 25-kg sack a vertical distance or 4 m? Both are the same amount of work because the force x distance is the same for each.
What relationship between distance traveled and time did Galileo discover for free falling objects?
Galileo conducted experiments using a ball on an inclined plane to determine the relationship between the time and distance traveled. He found that the distance depended on the square of the time and that the velocity increased as the ball moved down the incline.
What is the rate at which an object is moving at a given instant of time?
Instantaneous speed- is the rate at which an object is moving at a given instant in time.
How does velocity affect a plane?
The drag of the aircraft, like the lift, depends on the square of the velocity. So the drag will increase with increased velocity. Eventually, the new drag will be equal to the new thrust level and at that point, the forces will again balance out, and the acceleration will stop.
What is the formula for net force?
The net force can be calculated using Newton’s second law, which states that F = ma, where: F is the net force. m is the mass of the object. a is acceleration.
Which requires more work lifting a 70 kg sack 2 meters or lifting a 10 kg sack 14 meters?
Both require the same amount if work.
How much work is done when you lift a 24 kg mass 5 m?
So in this case the resultant force is required to overcome the downward weight force W=mg=24×9.8=235.2N . W=235.2N×5m=1176J .
How much work do you do when lifting a 50 kg box 0.5 m off the ground?
(a) Work=Weight X Distance=(50 kg)(9.81m/sec2)(0.5 m)= 0.2 kJ to one significant figure. (b) -0.2 kJ if gravitational force is something that can do work.
Which has zero acceleration?
An object at rest has zero acceleration. An object that continues to move in a straight line with constant velocity has zero acceleration.
What is Galileo’s law of free fall?
Ultimately, he recognized that all falling objects accelerate at the same rate and showed that the distance a falling object travels is directly proportional to the square of the time it takes to fall.
Why is acceleration constant in free fall?
Freefall is a special case of motion with constant acceleration, because acceleration due to gravity is always constant and downward. This is true even when an object is thrown upward or has zero velocity.
How does wind affect plane’s velocity?
The only thing a strong wind may do is affect the length of time the flight will take. If you have a strong headwind, it can slow down a flight. The opposite is true of a strong tailwind, and this may mean the flight takes longer than expected.
What happens to wind velocity as air pressure decreases?
Since the upper atmosphere currents move faster than the low atmosphere, the rising air currents in the low pressure system move faster than the sinking air currents in a high pressure system. This causes winds speeds in low pressure systems to be faster than in high pressure systems.
What happens to wind speed when air pressure decreases?
You’ve seen that air pressure and wind speed are related: as air pressure drops, wind speed increases.
What happens to wind speed as pressure decreases?
The Short Answer: Gases move from high-pressure areas to low-pressure areas. And the bigger the difference between the pressures, the faster the air will move from the high to the low pressure. That rush of air is the wind we experience.