Aforce is applied to the rim of a disk that can rotate like a merry-go-round, so as to change its angular velocity. its initial and final angular velocities, respectively, for four situations are: (a) -2 rad/s, 5 rad/s; (b) 2 rad/s, 5 rad/s; (c) -2 rad/s, -5 rad/s; and (d) 2 rad/s, -5 rad/s. rank the situations according to the work done by the torque due to the force, greatest first.

Answer

from work energy theorem we can say that work done is equal to change in kinetic energy.

now, we have given four choices where initial and final angular speed are given

square of 2 and -2 is equal to 4

square of 5 and -5 is equal to 5

By inserting all the given option.

       W = 21I J

Hence, in all the option the result will be same because magnitude of each option is same.

which three statements are true about all alloys?

gpe = mass x gravity constant x height or… gpe = mgh

where… mass: measured in kilograms (kg)

gravity: gravity constant on earth = 10.00 m/s2

height: measured in meters (m)

gpe: measured in joules (j) or kilojoules (kj)

how do you solve gpe?

gravitational potential energy (gpe) is the energy an object has because of its position above the. ground.

gpe = mass x gravity constant x height or… gpe = mgh.

mass:

note: to earn full marks when solving science word problems, you must show your work:

formula.

example:

given values:

mass = 0.3 kg.