The Linear speed of the CD is : 30.16 m/s
<u>Given data : </u>
Angular speed = 4800 RPM
Diameter of CD ( D )= 120 mm ≈ 0.12 m
<h3 /><h3>Determine the Linear speed of the CD </h3>
applying the equation : v = ( π DN ) / 60 m/s
Linear speed ( V ) = ( π * D * N ) / 60 m/s
= ( π * 0.12 * 4800 ) / 60
= 30.16 m/s
Hence we can conclude that the linear speed of the CD is : 30.16 m/s
Learn more about linear speed : brainly.com/question/25594119
Answer:
Absolute magnitude
Explanation:
The brightness a star would have if it were at 10 pc from Earth is called Absolute magnitude.
Explanation:
A worker picks up the bag of gravel. We need to find the speed of the bucket after it has descended 2.30 m from rest. It is case of conservation of energy. So,
h = 2.3 m
So, the speed of the bucket after it has descended 2.30 m from rest is 6.71 m/s.
Answer:
a) 4 s
b) 36 m/s²
c) 54 m
Explanation:
s = 2t³ – 24t + 6
a) Find t when v = 72 m/s.
v = ds/dt
v = 6t² – 24
72 = 6t² – 24
6t² = 96
t = 4
b) Find a when v = 30 m/s.
a = dv/dt
a = 12t
When v = 30:
30 = 6t² – 24
6t² = 54
t = 3
a = 36
c) Find Δs between t = 1 and t = 4
Δs = (2(4)³ – 24(4) + 6) – (2(1)³ – 24(1) + 6)
Δs = 38 – (-16)
Δs = 54
I think it is B hope this helps
God Bless