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KIM [24]
3 years ago
9

A rolling (without slipping) hoop with a radius of 0.27 m and a mass of 1.80 kg climbs an incline. At the bottom of the incline,

the speed of the hoop's center-of-mass is vi = 8.90 m/s. The incline angle is NOT needed in this problem. What is the angular speed of the hoop's rotation? Enter a number rad/s (5 attempts remaining)Input 1 Status What is the hoop's translational kinetic energy at the bottom of the incline? Enter a number J (5 attempts remaining)Input 2 Status What is the hoop's rotational kinetic energy at the bottom of the incline ? The hoop's moment of inertia is MR². (since its mass is concentrated on the edge). Enter a number J (5 attempts remaining)Input 3 Status Find the maximum (vertical) height h the hoop reaches on the incline.
Physics
1 answer:
Irina-Kira [14]3 years ago
6 0

Answer:

Explanation:

Angular speed of hoop ω = v / r

= 8.90 / .27

= 32.96 rad / s

Translational kinetic energy = 1/2 mv²

= .5 x 1.8 x 8.9²

= 71.29 J

Rotational kinetic energy = 1/2 Iω²

= 1/2 mR²x ω²

= 1/2 mv²

= 71.29 J

Total kinetic energy

= 2 x 71.29

= 142.58 J

This energy will be used to attain height

If h be the height attained

mgh = 142.58

h = 142.58 / mg

= 142.58 / 1.8 x 9.8

= 8.08 m .

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Nadya [2.5K]

Answer:

Correct answer:   a = 15.46 m/s²

Explanation:

The formula for accelerated movement with the given data is:

V² - V₀² = 2 · a · d     where the initial velocity  V₀ and the final V  

Since the initial velocity V₀ is zero, the formula is:

V² = 2 · a · d  => a = V² / (2 · d) = 27.8² / (2 · 25) = 772.84 / 50 = 15.46 m/s²

a = 15.46 m/s²

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3 years ago
Lesson 11: electricity & magnetism unit test physical science b unit 5: electricity and magnetism (connexus)
vovikov84 [41]

Electricity and magnetism can be considered as part of the same phenomenon because both are generated by electromagnetic forces.

<h3>What is electricity?</h3>

Electricity is the movement or flow of negatively charged electrons through a suitable conductor where a charge is applied.

Moreover, magnetism is a natural phenomenon caused by the generation/movement of electric charges.

In conclusion, electricity and magnetism can be considered as part of the same phenomenon because both are generated by electromagnetic forces.

Learn more on electricity and magnetism here:

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5 0
2 years ago
Sully is riding a snowmobile on a flat, snow-covered surface with a constant velocity of 10 meters/second. The total mass of the
Gelneren [198K]
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7 0
3 years ago
Read 2 more answers
A passenger at an airport pulls a rolling suitcase by its handle. If the force used is 10 N and the handle makes an angle of 25
Deffense [45]

Answer:

W= 1812.6 J

Explanation:

Work (W) is defined as the scalar product of force F by the distance (d) the body travels due to this force.  

W= F*d* cosα Formula ( 1)

Where:

F is the force in Newtons (N)

d is the displacemente in meters (m)

α : Angle formed between force and displacement

Data

F = 10 N

d = 200 m

α = 25°

Work done by the pulling force while the passenger walks 200 m

We replace data in the formula (1)

W= F*d* cosα

W= (10 N)*(200 m)* cos25°

W= 1812.6 (N*m)

W= 1812.6 J

6 0
3 years ago
C
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Answer:

constant volicty of the pumper when they hit ground 7.03-/s

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