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shusha [124]
2 years ago
14

Two uniform solid spheres of the same size, but different mass, are released from rest simultaneously at the same height on a hi

ll and roll to the bottom without slipping. Part A Which of the following statements about these spheres are true?
A. Both spheres reach the bottom at the same time.
B. The heavier sphere reaches the bottom ahead of the lighter one.
C. Both spheres arrive at the bottom with the same forward speed.
D. Both spheres arrive at the bottom with the same total kinetic energy.
Physics
1 answer:
SpyIntel [72]2 years ago
4 0

Answer:

options A and C

Explanation:

Since, the spheres are of same size and rotational speed of the sphere are not dependent on their masses. So, both the sphere will reach the bottom of the at the same time with the same speed. But their kinetic energies are different.

So, options A and C are correct.

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) By observing that the centripetal acceleration of the Moon around the Earth is ac = 2.7 × 10-3 m/s2, what is the gravitatonal
Sedbober [7]

Answer:

G = 6,786 10⁻¹¹ m³ / s² kg

Explanation:

The law of universal gravitation is

         F = G m M/ r²

Where G is the gravitational constant, m and M are the masses of the bodies and r is the distance from their centers

Let's use Newton's second law

         F = m a

The acceleration is centripetal

          a = a_{c}  

We replace

         G m M / r² = m  a_{c}  

         G =  a_{c}   r² / M

Let's replace and calculate

         G = 2.7 10⁻³ (3.88 10⁸)² / 5.99 10²⁴

         G = 6,786 10⁻¹¹ m³ / s² kg

Let's perform a dimensional analysis

[N m²/kg²] = [kg m/s²   m² / kg²] = [m³ / s² kg]

4 0
2 years ago
Please select the word from the list that best fits the definition
lina2011 [118]

Answer:

A subculture.

Explanation:

  • Aspects of a group that is based on the shared values and belief systems and the norms and behaviors aspects that are only a part of the subsection of society are called as subcultures. Like the goths, hippies, etc as its nor accepted by the entire population.
3 0
3 years ago
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3. Suppose that a block is pulled 16 meters across a floor. What amount of work is done if the force used to drag the block is 2
Nadusha1986 [10]

Explanation:

Work is the product of force and distance.

W = F×d

W = (22 N) × (16 m)

W = 352 J

7 0
3 years ago
A circuit component that is a composed of a semiconductor layer sandwiched between two other semiconductor layers is a(n)?
Alika [10]

Explanation:

It's a transistor. Hope that helps!

8 0
2 years ago
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1. A 26 kg cannon ball is fired from a cannon with muzzle speed of 962 m/s at an angle of 19.2 ◦ with the horizontal. The accele
iVinArrow [24]

Answer

given,

Mass of the cannon ball = 26 Kg

speed of cannon with muzzle = 962 m/s

angle with horizontal = 19.2°

angle of second ball = 144°

for first ball

v_y = v sin \theta_h................(1)

v_y = (962) sin 19.2^0

v_y = 316.37\ m/s

now equating kinetic energy and potential energy

\dfrac{1}{2}mv_y^2 = mgh

\dfrac{1}{2}v_y^2 = gh

h = \dfrac{v_y^2}{2g}.................(2)

h = \dfrac{316.37^2}{2\times 9.8}

h = 5106.63 m

total mechanical energy of ball at maximum height

angle = 144° = (90° + 54°)

so θ = 54°

E = \dfrac{1}{2}m(vsin\theta)^2

E =\dfrac{1}{2}\times 26 \times (962\times sin 54^0)^2

E = 7.75 x 10⁶ J

8 0
3 years ago
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