This question is incomplete, the complete question is;
A disk-shaped platform has a known rotational inertia ID. The platform is mounted on a fixed axle and rotates in an horizontal plane with an initial angular velocity of ωD in the counterclockwise direction, as shown. After an unknown time interval, the disk comes to rest. A single point on the disk revolves around the center axle hundreds of times before the disk comes to rest. Frictional forces are considered to be constant.
A student must determine the angular impulse that frictional force exert on the disk from the moment it rotates with angular velocity in the counterclockwise direction until it slopes. What additional data, if any should a student collect to determines the angular impulse on the disk?
Answer:
Ang Imp = I
× ω
Therefore, No additional data will be required to determine the angular impulse on the disk
Explanation:
Given the data in the question;
Angular impulse is given by;
Ang Imp = TΔt = IΔω
where I is the torque
Δt is time interval
I is moment of inertia
Δω is change in angular velocity
so
Ang Imp = I × ( ω - 0 )
Ang Imp = I × ω
Therefore, No additional data will be required to determine the angular impulse on the disk
Answer:
7,546 J
Explanation:
recall that Potential energy is given by
P.E = mgΔh
where m = 70kg (given)
g = 9.8 m/s² (acceleration due to gravity)
Δh = change in height
= distance from top of building to top of car
= height of building - height of car
= (5+8) - 2
= 11m
substituting all these into the equation:
P.E = mgΔh
= 70 x 9.8 x 11
= 7,546 J
The main reason is becouse these people are over 200 pounds and no mater how strong you are arms arnt ment to keep you up thanks.
No, since their gravity is powerful enough to keep them together even while the universe expands as a whole. Space is not expanding within clusters of galaxies.
<h3>What is a galaxy?</h3>
A galaxy is a massive clump of gas, dust, and billions of stars and their solar systems bound together by gravity.
No, since their gravity is powerful enough to keep them together even while the universe expands as an entire.
Hence,space is not expanding within clusters of galaxies.
To learn more about the galaxy, refer to the link;
brainly.com/question/2905713
#SPJ1
A paper pinwheel is spinning in the wind.
Which statement is correct about the forces responsible for the rotation?
The components of gravity and the force of wind that point through the pivot are responsible for the rotation.
Only the perpendicular component of wind is responsible for the rotation, because gravity points downward.
Only the perpendicular component of gravity is responsible for the rotation, because wind points toward the pivot.
The perpendicular components of gravity and the force of wind are responsible for the rotation.
Answer:
Only the perpendicular component of gravity is responsible for the rotation because wind points toward the pivot.
Explanation:
A pinwheel is a plaything that is made up of paper that is designed to spin when the wind comes in contact with it. The paper is held fast to its axle by a pin which enables it to spin.
Therefore, if the pinwheel is spun anti-clockwise, it brings electrical energy, converting the wind energy and <u>only the perpendicular component of gravity is responsible for the rotation because wind points toward the pivot. </u>
