B.by increasing the trend on his or her tires
C.by decreasing the air resistance
D.by decreasing aerodynamic design
The answer is C. by decreasing the air restistance. Hope this helps...
Answer:
Explanation:
The moment of inertia is the integral of the product of the squared distance by the mass differential. Is the mass equivalent in the rotational motion
a) True. When the moment of inertia is increased, more force is needed to reach acceleration, so it is more difficult to change the angular velocity that depends proportionally on the acceleration
b) True. The moment of inertia is part of the kinetic energy, which is composed of a linear and an angular part. Therefore, when applying the energy conservation theorem, the potential energy is transformed into kinetic energy, the rotational part increases with the moment of inertia, so there is less energy left for the linear part and consequently it falls slower
c) True. The moment of inertial proportional to the angular acceleration, when the acceleration decreases as well. Therefore, a smaller force can achieve the value of acceleration and the change in angular velocity. Consequently, less force is needed is easier
d. The lower the moment of inertia, the slower something will roll down an incline - this is the option that is NOT true. Objects with lower moments of inertia roll down inclines faster, not slower because they resist changes to their rotation less.
The correct statement that is NOT true among the provided options is: d.
The correct statement that is NOT true among the provided options is: d. The lower the moment of inertia, the slower something will roll down an incline.
The moment of inertia, often denoted by 'I', is essentially the rotational equivalent of mass for linear motion. It is a property of a body that measures its resistance to angular acceleration, which is its change in angular velocity.
However, the claim in statement d is not correct as per the principles of rotational motion in physics. An object with a lower moment of inertia would actually roll down an incline faster, not slower, given the same amount of gravitational potential energy, since it has less resistance to changes in its rotational motion.
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Answer:
The minimum current rating of the motor disconnecting means is 165 Amperes.
Explanation:
First convert the given power into units of watt. Since,
1 horsepower = 746 watts
Therefore,
40 horsepower = 40 x 746 watts
40 horsepower = 29840 watts
Since, we know that:
Power = Full Load Current (FLC) x Voltage
FLC = Power/Voltage
FLC = 29840 watts/208 volts
FLC = 143.46 Amperes
Now, the current for disconnecting means is at least 115% of the FLC, for the motors rated at 600 Volts or less.
Current for Disconnecting Means = (1.15)(143.46 A)
Current for Disconnecting Means = 165 Amperes