# College physics

An airplane is cruising along in a horizontal level flight at a constant velocity, heading due west.
(a) If the weight of the plane is 5.54 104 N, what is the net force on the plane?

(b) With what force does the air push upward on the plane?

1. 👍 0
2. 👎 0
3. 👁 277
1. This is a thinking exercise.

a) CONSTANT VELOCITY, zero acceleration.
netforce=mass*acceleration

b) What is the weight of the airplane?

1. 👍 0
2. 👎 0
2. The weight of the airplane is 5.54*10^4

1. 👍 0
2. 👎 0

1. 👍 0
2. 👎 0
4. A sound source producing 1.00-{\rm kHz} waves moves toward a stationary listener atone-half the speed of sound.
The frequency that the listener will hear is2000 Hz.
when the source is stationary and the listener moves towardthe source at one-half the speed of sound, the frequency that thelistener hear became 1500 Hz.
Explain on physical grounds why thetwo frequencies differ.

1. 👍 0
2. 👎 0

## Similar Questions

1. ### physics

You are traveling on an airplane. The velocity of the plane with respect to the air is 180 m/s due east. The velocity of the air with respect to the ground is 40 m/s at an angle of 30° west of due north. 1)What is the speed of

2. ### Physics

A woman in a car on a level road sees an airplane traveling in the same direction that is climbing at an angle of 30 degrees above the horizontal. By driving 110 km/h she is able to stay directly below the airplane. What is the

3. ### physics

when you see a traffic light turn red you apply the brakes until you come to a stop. if your initial speed was 12 m/s, and you were heading heading due west, what was your average velocity during braking? Assume constant

4. ### Physics

An airplane flying horizontally at a constant speed of 350 km/h over level ground releases a bundle of food supplies. Ignore the effect of the air on the bundle. a)What is the bundle’s initial vertical component of velocity? =0

1. ### Physics

Two airplanes leave an airport at the same time. The velocity of the first airplane is 690 m/h at a heading of 67.5 The velocity of the second is 620 m/h at a heading of 182◦ How far apart are they after 3.5 h? Answer in units

2. ### Pre-calculus

An airplane has an airspeed of 150 km/hr. It is to make a flight in a direction of 70 degrees while there is a 25 km/hr wind from 340 degrees. What will the airplane's actual heading be? Please Explain this Problem to me!!!!

3. ### Physics

Two airplanes leave an airport at the same time. The velocity of the first airplane is 730 m/h at a heading of 44.6 degrees. The velocity of the second is 610 m/h at a heading of 100 degrees. How far apart are they after 2.3 h?

4. ### Physics

A plane, diving with constant speed at an angle of 52.0° with the vertical, releases a projectile at an altitude of 790 m. The projectile hits the ground 6.00 s after release. (Assume a coordinate system in which the airplane is

1. ### PHYSICS(HELP)

In the lecture, we discussed the case of an isothermal atmosphere where the temperature is assumed to be constant. In reality, however, the temperature in the Earth's atmosphere is not uniform and can vary strongly and in a

2. ### Mathematics

An airplane has an airspeed of 400 km and is heading due west. If it encounters wind blowing north at 120 km/h, how many degrees north from west is the resultant velocity of the plane?

3. ### Physics

Your airplane leaves 20 degrees north (linear velocity = 845 nm/h), heading to a point due north at 25 degrees north (linear velocity = 815 nm/h). You set the autopilot for due north and go to sleep. If your flight time is 30

4. ### math

an airplane is flying at 550 km/h on a heading of 080. the wind is blowing at 60 km/h from a bearing of 120. Find the ground velocity of the airplane. Please Help! Thanks in advance.