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
Answer:
5 neutrons
Explanation:
Both protons and neutrons have a mass of about 1 atomic mass unit (amu). The number in the notation for an isotope is its mass in amu. That means the number is essentially the sum of protons and neutrons in the isotope (electrons don't contribute significantly to the mass).
If lithium has 3 protons, lithium-8 has 8 - 3 = 5 neutrons.
Speed of the tip of the minute hand=V=0.0244 cm/s
Explanation:
The angular velocity of the minute hand is given by
T= time period of the minute hand=60 min=3600 s
so ω= 2 π/3600 rad/s
Now linear velocity v= r ω
r= radius of minute hand=14 cm
so v= 14 (2 π/3600)
V=0.0244 cm/s
An object undergoing <span>uniform circular motion </span>is moving with a constant speed. Nonetheless, it is accelerating due to its change in direction. So I'm thinking velocity
Velocity of the sled is 3.2 m/s
