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sergiy2304 [10]
3 years ago
12

The measurement of 50m east is

Physics
1 answer:
Nostrana [21]3 years ago
6 0

Answer:idk

Explanation:idk

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Q.By the method of dimensional analysis derive the
Artyom0805 [142]

Answer

a) Using dimensional analysis we cannot derive the relation, But we can check the  correctness of the formula.

  s = u t +\dfrac{1}{2}at^2

now,  L H S

  s = distance

  dimension of distance = [M⁰L¹T⁰]

now, equation on the right hand side

 R H S

 u = speed

 u = m/s

 Dimension of speed = [M⁰L¹T⁻¹]

dimension of time

  t = sec

 Dimension of time = [M⁰L⁰T¹]

 Dimension of 'ut' = [M⁰L¹T⁻¹][M⁰L⁰T¹]

                              = [M⁰L¹T⁰]

now, acceleration= a

  a = m /s²

dimension of acceleration = [M⁰L¹T⁻²]

dimension of (at²) = [M⁰L¹T⁻²][M⁰L⁰T¹][M⁰L⁰T¹]

                              = [M⁰L¹T⁰]

hence, the dimension are balanced.

so, L H S = R H S

b) Moment of inertia of hollow sphere = \dfrac{2}{3}Mr^2

  Moment of inertia of solid sphere = \dfrac{2}{5}Mr^2

   we know,

    \tau = I \alpha

    \alpha=\dfrac{\tau}{I}

Torque is the force that causes rotation

If the same amount of torque is applied to both spheres the sphere with bigger moment of inertia would have smaller angular velocity.

Thus the solid sphere would accelerate more.

4 0
3 years ago
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Similarity of gravity and electromagnetic force
Mashutka [201]

Answer:

Gravity is an attractive force as well as electromagnetic, but electromagnetic attracts and repels.

Explanation:

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3 years ago
Mary starts from her house, walks 80 meters south, and stops to chat with her aunt on the sidewalk. After chatting for a few min
Alex

Average speed = (total distance covered) / (time to cover the distance)

Total distance = (80m) + (125m) + (45m) = 250 meters

Overall time = 10 minutes

Average speed = (250 meters) / (10 minutes)

<em>Average speed = 25 meters/minute </em>

Since we're only looking for average speed and not velocity, we don't care about any of the directions, and we don't need to calculate Mary's displacement.

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3 years ago
Who is Tim peak where did he come from
Paul [167]
I believe you mean Tim Peake ? .Major Timothy Nigel "Tim" Peake CMG is a British Army Air Corps officer, European Space Agency astronaut and International Space Station crew member. 

Born: April 7, 1972 (age 44), Chichester, United Kingdom

Space missions: Expedition 46, Expedition 47, Soyuz TMA-19M

Nationality: British

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which of the following is not a projectile? a.a satellite b.a throw ball c.a ball on the ground d.a soaring arrow
Delvig [45]
C a ball on the ground
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