Answer;
= 60 m
Explanation;
s = 80 m
= ½at² = ½ * 9.8m/s² * t² → t = 4.04 s
At any time 0 ≤ t ≤ 4.04 s, height is
y = Yo + ½at² = 80 m - 4.9m/s² * t²
so at t = 4.04s/2 = 2.02 s,
y = 80 m - 4.9m/s² * (2.02s)² = 60 m
(so it drops 15 m during the first 2.02 s and 60 m during the second 2.02 s)
Answer:
v₀ₓ = 63.5 m/s
v₀y = 54.2 m/s
Explanation:
First we find the net launch velocity of projectile. For that purpose, we use the formula of kinetic energy:
K.E = (0.5)(mv₀²)
where,
K.E = initial kinetic energy of projectile = 1430 J
m = mass of projectile = 0.41 kg
v₀ = launch velocity of projectile = ?
Therefore,
1430 J = (0.5)(0.41)v₀²
v₀ = √(6975.6 m²/s²)
v₀ = 83.5 m/s
Now, we find the launching angle, by using formula for maximum height of projectile:
h = v₀² Sin²θ/2g
where,
h = height of projectile = 150 m
g = 9.8 m/s²
θ = launch angle
Therefore,
150 m = (83.5 m/s)²Sin²θ/(2)(9.8 m/s²)
Sin θ = √(0.4216)
θ = Sin⁻¹ (0.6493)
θ = 40.5°
Now, we find the components of launch velocity:
x- component = v₀ₓ = v₀Cosθ = (83.5 m/s) Cos(40.5°)
<u>v₀ₓ = 63.5 m/s</u>
y- component = v₀y = v₀Sinθ = (83.5 m/s) Sin(40.5°)
<u>v₀y = 54.2 m/s</u>
<span>What is the process of conduction in terms of particle movement chocies
</span>
