Answer:
average acceleration = 2.74 x 10⁻³ rad/s²
Explanation:
given,
CD playing time = 76 minutes
initial angular speed of CD = 4.10 × 10² rev/min
=
= 42.9 rad/s
final angular speed of CD = 2.90 × 10² rev/min
=
= 30.37 rad/s
average acceleration =
=
average acceleration = 0.00274 rad/s²
average acceleration = 2.74 x 10⁻³ rad/s²
The change in momentum, Δp, of the body is 23520 Kgm/s
<h3>Momentum </h3>
- The momentum of a body is defined as the product of its mass and velocity
Momentum, p = m×v
<h3>Change in momentum </h3>
Change in momentum is equal to the final momentum minus the intiala momentum
Change in momentum = mv - mu
Mass of car = weight/g
where g = 10 m/s^2
Mass of car = 15680/10
Mass of car = 1568 Kg
Change in momentum = 1568 Kg × 20 - 1568 Kg × 5
Change in momentum, Δp = 23520 Kgm/s
Therefore, the change in momentum, Δp, of the body is 23520 Kgm/s
Learn more about momentum at: brainly.com/question/7538238
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