You can find velocity when acceleration is constant.
file example see below.
Answer:
The softball hits the ground first because it is less affected by air resistance.
Explanation:
Answer:
Explanation:
This problem indicates that the speed of light in a material medium is 0.5 10⁸ m / s, they ask to find the critical angle between the material and the vacuum
Let's find the refractive index of the material
n = c / v
n = 3 10⁸ / 0.5 10⁸
n = 6
When the material passes from one medium to another, it must comply with the law of refraction
n₁ sin θ = n₂ sin θ₂
for the angle criticize the angles tea2 = 90
tea = sin⁻¹n₂/ n₁
The vacuum replacement index is n₂ = 1
tea = sin⁻¹ (1/6)
tea = 9.59º
Answer:
<h2>1)</h2><h2>TRUE</h2><h2>2)</h2><h2>TRUE</h2><h2>3)</h2><h2>TRUE</h2><h2>4)</h2><h2>
</h2><h2>5)</h2><h2>v = 100 m/s</h2>
Explanation:
1)
As we know by the formula of speed of sound we have
So approx speed of the sound is nearly 340 m/s
so its TRUE
2)
Wave speed is given as
so it is given as
TRUE
3)
so from above equation we have
4)
Wavelength is given as
5)
As we know that
so we will have
Answer:
a) W = 40.49 10² J and b) W₂ = - 3308.7 J
Explanation:
The equation for work is
W = F. d
Bold indicates vectors, we can also write that equation with the modules
W = F d cos θ
Where θ is the angle between force and displacement
a) Traction reinforcement work
W = 3.59 10² 12.3 cos 23.5
W = 40.49 10² J
b) frictional force work, we have to use Newton's second law to find the friction force
Y Axis
N-W = 0
N = W
The formula for friction force is
fr = μ N
fr = μ mg
fr = 0.289 95.0 9.8
fr = 269 N
The friction force opposes the movement, so that at an angle it is 180º
W₂ = fr d cos T
W₂ = 269 12.3 cos 180
W₂ = - 3308.7 J
