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stealth61 [152]
3 years ago
15

Note: the 2 in the answers are exponents

Physics
1 answer:
stiks02 [169]3 years ago
4 0

Final speed after collision with the wall

v_f = -0.4 m/s

before collision the speed of ball initially

v_i = 0.6 m/s

time taken for the collision

\Delta t = 0.2 s

now as per the formula of acceleration we know that

a = \frac{v_f - v_i}{\Delta t}

now plug in all values in it

a = \frac{-0.4 - 0.6}{0.2}

a = -5.0 m/s^2

so acceleration is - 5 m/s/s for above situation

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In an attempt to reduce the extraordinarily long travel times for voyaging to distant stars, some people have suggested travelin
alexandr402 [8]

Answer:

a) v=0.999124c

b) E=7.566*10^{22}

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Explanation:

From the question we are told that

Distance to Betelgeuse d_b=430ly

Mass of Rocket M_r=20000

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Generally the equation of speed of rocket v mathematically given by

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v=860ly/ \triangle t

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b)

Generally the equation of the energy E required to attain prior speed mathematically given by

E=\frac{1}{\sqrt{1-(v/c)^2} }-1(20000kg)(3*10^8m/s)^2

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8 0
3 years ago
1.Suppose someone pulls a cart up a ramp a distance of 85cm along the ramp with a force of 15N.
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W=Fd

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F = 15 N is the magnitude of the force

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Substituting in the formula, we get

W=(15 N)(0.85 m)=12.75 J


2. 10.6 N

In this part, the cart reaches the same vertical height as in part A. This means that the same work has been done (because the work done is equal to the gain in gravitational potential energy of the object: but if the vertical height reached is the same, then the gain in gravitational potential energy is the same, so the work done must be the same).

Therefore, the work done is

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3 0
3 years ago
Q.By the method of dimensional analysis derive the
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Answer

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

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now,  L H S

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now, equation on the right hand side

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

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hence, the dimension are balanced.

so, L H S = R H S

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

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

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3 years ago
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