Answer:
The moment of inertia of disk B is 0.446 kilogram-square meters.
Explanation:
In this case, the moment of inertia of the disk B can be determined by means of the Principle of Conservation of Angular Momentum, whose model is:
(1)
Where:
, - Moments of inertia of disks A and B, in kilogram-square meters.
, - Initial angular velocities of disks A and B, in radians per second.
- Final angular velocity of the resulting system, in radians per second.
Let suppose that disk A rotates counterclockwise, whereas disk B rotates clockwise and that resulting system rotates counterclockwise. If we know that , , and , then the moment of inertia of the disk B is:
The moment of inertia of disk B is 0.446 kilogram-square meters.
A) Weight is dependent on gravity mass is not because of an object is on the moon it’s weight will be different but it’s mass stays the same
Answer:
14.44 revolutions
Explanation:
unit conversion:
85mile/hour = 85mile/hour * 5280ft/mile * 1/3600hours/second = 448800ft/hour = 124.67 ft/s
1800rev/min = 1800rev/min * 1/60min/seconds = 30 rev/s
The time it takes for the 85mph base ball to travel 60 ft is
t = s/v = 60 / 124.67 = 0.4813 seconds
By that time, the number of revolution it would make is:
r = 30 * 0.4813 = 14.44 revolutions
Answer:
150 J
Explanation:
Work: This can be defined as the product of force and distance. The S.I unit of work is Joules (J)
The work done in lifting the crate = Force × distance.
W = F×d .............................. Equation 1.
Where F = force, d = distance, W = work done in lifting the crate,
Given: F = 100 N, d = 1.5 m.
Substituting these values into equation 1
W = 100(1.5)
W = 150 J.
Thus the work done in lifting the crates to that height is 150 J
Answer:
Angular acceleration,
Explanation:
It is given that,
Displacement of the rotating wheel,
Time taken, t = 2.9 s
Initial speed of the wheel,
Final speed of the wheel,
Let is the angular acceleration of the wheel. Using the third equation of kinematics to find it as :
So, the angular acceleration of the wheel is . Hence, this is the required solution.