Two projectiles are fired simultaneously, on Earth, from the origin. Projectile

Question

Two projectiles are fired simultaneously, on Earth, from the origin. Projectile A has an initial velocity of 3.50 m/s @25 degree above the horizontal, forward direction. Projectile B has an initial velocity of 4.00 m/s @20 degree above the horizontal, forward. Determine which projectile goes the highest (show your work)? Which projectile hits the ground first if the ground is 1.50 m below the launch point (Show Which projectile travels farther horizontally if the ground is 1.50 m below the launch point above the window is A rock is dropped from somewhere above a window. The distance from the bottom of the window to the top of the window is 1.20 m. If it takes 0.23 s for the rock to travel from top to bottom how when the dropping point?

Explanation / Answer

Here,

distance , d = 1.20 m

time , t = 0.23 s

let the initial speed of the window top is u

Using second equation of motion

y = u * t + 0.5 * g * t^2

1.20 = u * 0.23 + 0.5 * 9.8 * 0.23^2

solving for u

u = 4.09 m/s

let the height of window above the dropping point

height of window above the dropping point = u^2/(2 * g)

height of window above the dropping point = 4.09^2/(2 * 9.8)

height of window above the dropping point = 0.853 m

the height of window above the dropping point is 0.853 m

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