A small block on a frictionless, horizontal surface has a mass of 2.90×10-² kg. It is attached to a massless cord passing through a hole in the surface (Figure 1). The block is originally revolving at a distance of 0.300 m from the hole with an angular speed of 2.91 rad/s. The cord is then pulled from below, shortening the radius of the circle in which the block revolves to 0.150 m. Model the block as a particle.
A small block on a frictionless, horizontal surface has a mass of 2.90×10-² kg. It is attached to a massless cord passing through a hole in the surface (Figure 1). The block is originally revolving at a distance of 0.300 m from the hole with an angular speed of 2.91 rad/s. The cord is then pulled from below, shortening the radius of the circle in which the block revolves to 0.150 m. Model the block as a particle.
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![A small block on a frictionless, horizontal surface has a mass of 2.90×10-2 kg. It
is attached to a massless cord passing through a hole in the surface (Figure 1).
The block is originally revolving at a distance of 0.300 m from the hole with an
angular speed of 2.91 rad/s. The cord is then pulled from below, shortening the
radius of the circle in which the block revolves to 0.150 m. Model the block as a
particle.
Figure
1 of 1
▼
Y
✓ Correct
The net force is due to the tension in the rope, which always acts in the radial direction
Part B
What is the new angular speed?
Express your answer in radians per second.
W₂ =
Submit
Part C
AK =
Submit
Find the change in kinetic energy of the block.
Express your answer with the appropriate units.
Part D
V=| ΑΣΦ
G]
W
Request Answer
μA 4
Value
Request Answer
How much work was done in pulling the cord?
Express your answer with the appropriate units.
Units
HA S
S
Laite
?
?
?
rad/s](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F76eec8ec-d87c-4fdd-96a3-96e8325f09a2%2F8d15e601-7801-48e1-ac30-5684560ccbfb%2Fzenpm5_processed.jpeg&w=3840&q=75)
Transcribed Image Text:A small block on a frictionless, horizontal surface has a mass of 2.90×10-2 kg. It
is attached to a massless cord passing through a hole in the surface (Figure 1).
The block is originally revolving at a distance of 0.300 m from the hole with an
angular speed of 2.91 rad/s. The cord is then pulled from below, shortening the
radius of the circle in which the block revolves to 0.150 m. Model the block as a
particle.
Figure
1 of 1
▼
Y
✓ Correct
The net force is due to the tension in the rope, which always acts in the radial direction
Part B
What is the new angular speed?
Express your answer in radians per second.
W₂ =
Submit
Part C
AK =
Submit
Find the change in kinetic energy of the block.
Express your answer with the appropriate units.
Part D
V=| ΑΣΦ
G]
W
Request Answer
μA 4
Value
Request Answer
How much work was done in pulling the cord?
Express your answer with the appropriate units.
Units
HA S
S
Laite
?
?
?
rad/s
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