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Physics 1135 || All Questions Answered Correctly.
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The final speed v f for the hoop and for the disk when they reach the bottom of the incline is: correct answers independent of mass and the radius Given that the moment of inertia for a solid sphere about its center of mass is I = 2/5 MR^2 . The final speed v 'sub' f for the sphere when it reach...

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  • September 26, 2024
  • 4
  • 2024/2025
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  • the final speed v f for the hoop and for the disk

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Physics 1135 || All Questions Answered Correctly.
The final speed v f for the hoop and for the disk when they reach the bottom of the incline is:
correct answers independent of mass and the radius

Given that the moment of inertia for a solid sphere about its center of mass is I = 2/5 MR^2 . The
final speed v 'sub' f for the sphere when it reaches the bottom of the incline is: correct answers
{SQRT}(10gH / 7)

According to the video "Different objects rolling down a ramp: Observational experiment," in
the race down the incline between the solid brass cylinders with a Small radius 425g and with
Large radius 797g, which one is first to reach the bottom of the incline? correct answers both
cylinders at the same time

According to the video "Different objects rolling down a ramp: Observational experiment," in
the race down the incline between the solid Ball 151g and the solid Disk 159g, which one is first
to reach the bottom of the incline? correct answers Ball

A rotating carousel has a boy sitting on a horse near the outer edge and a girl sitting on a lion
halfway out from the center. Which of the following is true? correct answers Both children have
the same angular velocity.

A block attached to a hanging spring oscillates up and down with a period of 10s on Earth.
If you take the block and spring to the Moon, where the free-fall acceleration is only about 1/6 of
that on Earth,
what will the new period of oscillations be? correct answers 10s

You increase the amplitude of a simple harmonic oscillator by a factor of 2. Which is true?
correct answers The total mechanical energy increases by a factor of four,
and the period remains the same.

A boy of mass m runs with a speed v towards a merry-go-round of mass M and radius R that is
initially at rest. He is running tangentially to the side of the merry-go-round and clings to the
outer edge. The moment of inertia for a disk is 1 2 M R 2. The angular speed of the boy on the
merry-go-round is: correct answers 2mv/(2m+M)R

A block attached to a spring is undergoing simple harmonic motion. What is the ratio of its
kinetic energy to its total mechanical energy when it is two-thirds of the way to the maximum
distance from its equilibrium position? correct answers 5/9

A spinning ice skater has her arms extended. When she pulls her arms in close to her body,
which of the following is true? correct answers [All of these answers are correct]
>I i ω i = I f ω f
>Her moment of inertia decreses
>Her angular velocity increases

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