(a) The projectile's velocity at the highest point of its trajectory is 51.96 m/s.
(b) The maximum height reached by the projectile is 45.92 m.
<h3>
Projectile velocity at the highest point of trajectory</h3>
At the highest point of trajectory the vertical component of the velocity will be zero will the horizontal component will remain constant.
Vxi = Vxf = Vcosθ = 60 x cos30 = 51.96 m/s
<h3>Maximum height of the projectile</h3>
The maximum height reached by the projectile is calculated as follows;
H = u²sin²θ/2g
H = (60² x (sin30)²)/(2 x 9.8)
H = 45.92 m
Learn more about projectile here: brainly.com/question/24216590
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The weight is not coming from the center of the mass because the force that act on it is not is equal is side.(2) section B donot have weight because the ruler bend down and section be raise up so no weight.
X can probably be vacuum through space through air and or solid objects
Plutonium= Pu, 94, 244,94,94
Chromium= Cr, 24,52, 24,24
Neon = Ne, 10,20,10,10
Gold= Au, 79,197,79,79
Radon = Ra ,86,222,86,86