A negatively charged rod is placed near two neutral metal spheres, as shown below. Which statements describe the charging method
2 answers:
You might be interested in
Answer:
3.3619 Nm
54.27472 rad
182.46618 J
86.88 W
Explanation:
= Initial angular momentum = 7.2 kgm²/s
= Final angular momentum = 0.14 kgm²/s
I = Moment of inertia = 0.142 kgm²
t = Time taken
Average torque is given by
Magnitude of the average torque acting on the flywheel is 3.3619 Nm
Angular speed is given by
Angular acceleration is given by
From the equation of rotational motion
The angle the flywheel turns is 54.27472 rad
Work done is given by
Work done on the wheel is 182.46618 J
Power is given by
The magnitude of the average power done on the flywheel is 86.88 W
Explanation:
Given that,
Initial speed of the airfield, u = 0
Final speed, v = 27.8 m/s
Acceleration of the airfield,
Length of the runway, d = 150 m
Let v' is the speed of the airplane to reach the required speed for takeoff. Finding v' using third equation of motion as :
This speed is not enough as the airfield must reach a speed before takeoff of at least 27.8 m/s. Now, the required length of the runways is :
So, the minimum length of the runways is 193.21 meters.