Physiscs

A mortar shell needs to be dropped into a bunker at an angle of 80 degree from level ground. The bunker is 100 yards away. How much velocity must the shell leave the cannon to accomplish this task?

  1. 👍
  2. 👎
  3. 👁
  1. If same height at both ends, symmetric parabolic path.

    Goes 100 yards? I guess I use obsolete units, 300 feet and g = 32 ft/s^2

    Vi = V sin 80 = .984 V
    u = V cos 80 = .174 V

    300 feet = u t
    300 = .174 V t

    how long does it take?
    h = Vi t - 16 t^2
    h = 0 at start and finish
    16 t^2 -Vi t = 0
    t (16 t-Vi) = 0
    t at target = Vi/16

    Vi = .984 V
    so t = .0615 V
    and
    300 = .174 V (.0615 V)
    V^2 = 28034
    V = 167 feet/second

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. Biocheistry

    What is the significance of carbon having four valence electrons?(1 point) The outermost shell can only bond with hydrogen. The outermost shell is full, making it a stable. The outermost shell can form up to four covalent bonds.

  2. physics

    a trench mortar fires a shell at an angle of 30 degrees with the horizontal and with a speed of 500 m/s. find its range and the maximum height it attains?

  3. Physics

    A shell is fired from the ground with an initial speed of 1.60 × 103 m/s (approximately five times the speed of sound) at an initial angle of 43.0◦ to the horizontal. The acceleration of gravity is 9.81 m/s2 . a) Neglecting air

  4. math

    Find an angle between 0 degree and 360 degree that is coterminal with given angle. a. 361 degree b. -100 degree c. 1270 degree

  1. physics

    A mortar fires a projectile at an angle of of 30 degrees above the horizontal with a velocity of 500 m/s. A soldier spots a tank to be travelling in the direction of the mortar at a constant the rate of 4 m/s. How far should the

  2. Science

    A gun fires a shell at an angle of elevation of 30 degrees with a velocity of 2*10^3m/s. What is the horizontal and vertical component of the velocity? What is the range of the shell? how high will the ball rise

  3. Math

    In the figure below angle y and angle x form vertical angles angle y forms a straight line with the 60 degree angle and the 70 degree w Angle Write and solve an equation to determine the measure of angle c

  4. Physics

    A 2.50 kg fireworks shell is fired straight up from a mortar and reaches a height of 110. m. (a) Neglecting air resistance (a poor assumption, but we will make it for this example), calculate the shell’s velocity when it leaves

  1. physics

    A shell leaves a mortar with a muzzle velocity of 500 ft/s directed upward at 60 degrees with the horizontal. Determine the position of the shell and its resultant velocity 20 s after firing. how high will it rise?

  2. Physics

    A shell is fired from the ground with an initial speed of 1.54 ✕ 103 m/s at an initial angle of 52° to the horizontal. (a) Neglecting air resistance, find the shell's horizontal range. (b) Find the amount of time the shell is

  3. Physics

    a shell is fired at a velocity of 300 m/s at an angle of 30. a. how far does it go? b. what are it's time of flight and maximum altitude? c. At what other angle could the shell have been fired to have the range?

  4. math

    The supplement of an angle measures 11 times its complement. Then the measure of the angle is: (A) 9 degree (B) 99 degree (C) 81 degree (D) 90 degree (E) none of these not just answer, please tell me how to do it

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