Ask Question
10 March, 20:52

A shell is fired from the ground with an initial speed of 1.57 ✕ 103 m/s at an initial angle of 38° to the horizontal. (a) Neglecting air resistance, find the shell's horizontal range. 122000 Incorrect: Your answer is incorrect. m (b) Find the amount of time the shell is in motion. 98.6 Incorrect: Your answer is incorrect. s

+3
Answers (1)
  1. 10 March, 23:39
    0
    a) Shell's horizontal range = 243798.70 m

    b) The amount of time the shell is in motion = 197.06 s

    Explanation:

    Consider the vertical motion of projectile,

    We have equation of motion s = ut + 0.5 at²

    Initial velocity, u = 1.57 x 10³ sin 38 = 966.59 m/s

    Acceleration, a = - 9.81 m/s²

    Displacement is zero when the shell reaches back to ground, s = 0 m

    Time, t = ?

    Substituting,

    s = ut + 0.5 at²

    0 = 966.59 x t + 0.5 x (-9.81) x t²

    t = 197.06 seconds

    b) The amount of time the shell is in motion = 197.06 s

    a) Consider the horizontal motion of shell

    We have equation of motion s = ut + 0.5 at²

    Initial velocity, u = 1.57 x 10³ cos 38 = 1237.18 m/s

    Acceleration, a = 0 m/s²

    Displacement, s = ?

    Time, t = 197.06 s

    Substituting,

    s = ut + 0.5 at²

    s = 1237.18 x 197.06 + 0.5 x 0 x 197.06²

    s = 243798.70 m

    Shell's horizontal range = 243798.70 m
Know the Answer?
Not Sure About the Answer?
Get an answer to your question ✅ “A shell is fired from the ground with an initial speed of 1.57 ✕ 103 m/s at an initial angle of 38° to the horizontal. (a) Neglecting air ...” in 📙 Physics if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers