Driving a motor vehicle often requires reaction time.
a. standard
b. simple
c. complex
d. visual
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Ответ:
Standard
Explanation
Driving a motor vehicle, requires a standard training. It is a course that requires a lot training and experience.
Driving a motor vehicles require concentration. Careless driving leads to pamanent injuries and in other cases death.
For this reason Driving a motor vehicle often requires standard reaction time.
Ответ:
a) , b)
Explanation:
The magnitude of torque is a form of moment, that is, a product of force and lever arm (distance), and force is the product of mass and acceleration for rotating systems with constant mass. That is:
Where is the angular acceleration, which is constant as torque is constant. Angular deceleration experimented by the unpowered flywheel is:
Now, angular velocities of the unpowered flywheel at 50 seconds and 100 seconds are, respectively:
a) t = 50 s.
b) t = 100 s.
Given that friction is of reactive nature. Frictional torque works on the unpowered flywheel until angular velocity is reduced to zero, whose instant is:
Since , then the angular velocity is equal to zero. Therefore: