Advanced Placement (AP): The initial angular velocity and angular acceleration of four rotating objects at the same instant in time are listed in the table that follows. For each of the object determine the final angular speed after an elapsed time of 2.1 s

Sea water and crushed chevrette heads...

The initial angular velocity and angular acceleration

Jadalamanna

18.03.2022

Explanation:

The elapsed time, t = 2.1 s

(a) Initial angular velocity, $\omega_0=12.4\ rad/s$ and angular acceleration, $\alpha =4\ rad/s^2$

Final angular velocity,

$\omega_f=\omega_i+\alpha t\\\\\omega_f=12.4+4(2.1)\\\\\omega_f=20.8\ rad/s$

(b) Initial angular velocity, $\omega_0=12.4\ rad/s$ and angular acceleration, $\alpha =-4\ rad/s^2$

Final angular velocity,

$\omega_f=\omega_i+\alpha t\\\\\omega_f=12.4+(-4)(2.1)\\\\\omega_f=4\ rad/s$

Final angular velocity,

$\omega_f=\omega_i+\alpha t\\\\\omega_f=-12.4+(4)(2.1)\\\\\omega_f=-4\ rad/s$

(d) Initial angular velocity, $\omega_0=-12.4\ rad/s$ and angular acceleration, $\alpha =-4\ rad/s^2$

Final angular velocity,

$\omega_f=\omega_i+\alpha t\\\\\omega_f=-12.4+(-4)(2.1)\\\\\omega_f=-20.8\ rad/s$

0,0(0 оценок)