Physics

A pilot of mass 65 kg in a jet aircraft makes a complete vertical circle in mid-air. The vertical circle has a radius of 1.70 km at a constant speed of 215 m/s. Determine the force of the seat on the pilot at (a) the bottom of the loop and (b) the top of the loop. (Note that at the top of the loop, the aircraft is upside down.)
Okay, i know that first i will have to use 1700m as my radius.
Also, i know the equations i will have to work with (uniform circular motion
Centripetal Force= mass times velocity squared, all over radius.)
But, am i looking for the Fn (Normal Force) ..
and ifso,
Centripetal force will equal force of gravity plus the normal force in both situations, so how will the situations differ? like, is there something i'm missing?
Please explain, thanks :)

  1. 👍
  2. 👎
  3. 👁
  1. It is very good that you have mentioned what you have already found, and what bothers you.

    Basically, the centripetal force Fc=mv²/r will exert extra load on the seat. The extra load is radially outwards.

    Therefore, when the pilot is at the bottom of the loop, Fc adds to gravity, which is mg. With the sign convention of positive upwards, it would be -Fc-mg.

    When he is at the top of the loop, gravity is -mg (downwards), which is added to Fc. So the total force on the seat is Fc-mg (upwards).

    Therefore you see that the two net forces on the seat are different when at the top and at the bottom of the loop.

    1. 👍
    2. 👎
  2. A motor car is uniformly and brought to rest form a speed of 108km/h in 15 seconds.find its ation

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. physics

    a jet pilot takes his aircraft in a vertical loop. a) if the jet is moving at a speed of 2000 km/h at the lowest point of the loop, determine the minimum radius of the circle so that the centripetal acceleration at the lowest

  2. physics

    A stone with a mass of 1.0 kg is tied to the end of a light string which keeps it moving in a circle with a constant speed of 4.0 m/s on a perfectly smooth horizontal tabletop. The radius of the path is 0.60 m. How much work does

  3. Physics

    Part One: The decibel level of the noise from a jet aircraft is 130 dB when measured 19.3 m from the aircraft. How much sound power does the jet aircraft emit? Answer in units of W - 46673.5W I need help with Part Two: Part Two:

  4. Physics - 2

    A single bead can slide with negligible friction on a wire that is bent into a circular loop of radius 15.0 cm, as in Figure P6.68. The circle is always in a vertical plane and rotates steadily about its vertical diameter with (a)

  1. Physics

    A stunt pilot in an air show performs a loop-the-loop in a vertical circle of radius 3.70 103 m. During this performance the pilot whose weight is 740 N, maintains a constant speed of 2.25 102 m/s. (a) When the pilot is at the

  2. maths --plse help me..

    The pilot of an aircraft flying horizontally at a speed of 1200 Km/hr observes an angle of depression of a point on the ground changes from 30 degree to 45 degree in 15 seconds. Find the height of the aircraft at which it is

  3. physics

    a atapult launcher on an aircraft carrier accelerates a jet from rest to 72m/s. The work done catapult during the launch is 7.6 x 10 to the 7th J. a)What is the mass of the jet? b) If the jet is in contact with the catapult for

  4. Science

    A jet aircraft is traveling at Mach 2.5 through air at 1 °C. What is the jet's speed in m/sec? I can do the equation myself, I just need to know what equation I need to do in order to find the answer.

  1. physics

    a single bead can slide with negligible friction on a wire that is bent into circular loop of radius 15 cm an in the figure. the circle is always in a vertical plane and rotates steadily about its vertical diameter with a period

  2. Physical Sciences

    As a fighter pilot makes a tight turn (with his head toward the centre of curvature), the blood drains from his head, leading to loss of brain function. Once the radial acceleration reaches about 4g, the pilot’s vision switches

  3. Physics

    A pilot, whose mass is 91.0 kg, makes a loop-the-loop in a fast jet. Assume that the jet maintains a constant speed of 125 m/s and that the radius of the loop-the-loop is 0.478 km. What is the apparent weight that the pilot feels

  4. Physics

    A stunt pilot of mass 55.0 kg who has been diving her airplane vertically pulls out of the dive by changing her course to a circle in a vertical plane. A)If the plane's speed at the lowest point of the circle is 95.6 m/s , what is

You can view more similar questions or ask a new question.