Both B and C are correct since they present identical options proposed in the question. Utilizing a lower gear in a vehicle aids in managing speed while descending a hill. It also helps preserve the brakes, which can overheat and lead to failures if overused on slopes. Shifting to a lower gear allows the engine to help reduce speed, although brakes may still be applied with less force. In this scenario, Stella should downshift to maintain control of her speed while descending the hill for safety.
<span> </span><span>When the net torque and moment of inertia are given, calculating becomes straightforward.
Using the equation torque = I * alpha, where I represents the moment of inertia and alpha is the angular acceleration.
Consequently, 0.098 / 0.000075 results in 1306.666... rad / s^2
While the angular acceleration stays the same, you can also determine the angular velocity at that instance, which is 21.36 rad / s.</span>
The period, T, refers to the time taken for a single rotation.
The angular velocity is specified as 4π rad/s.
As one complete revolution equals 2π radians, we arrive at the period by calculating T = (2π rad)/(4π rad/s) = 0.05 s.
Response: 0.5 s
