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Gemiola [76]
3 years ago
15

The angle between incident ray and reflected ray is 60°. What will be  the value of angle of incidence and angle of reflection.?

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Physics
1 answer:
Damm [24]3 years ago
7 0

The angle between incident ray and reflected ray is 60 degree. the value of angle of incidence and angle of reflection is 30 degree

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A car moving with an initial speed v collides with a second stationary car that is one-half as massive. After the collision the
Mashutka [201]

Answer:

4v/3

Explanation:

Assume elastic collision by the law of momentum conservation:

m_1v = m_1v_1 + m_2v_2

where v is the original speed of car 1, v1 is the final speed of car 1 and v2 is final speed of car 2. m1 and m2 are masses of car 1 and car 2, respectively

Substitute m_2 = m_1/2 \& v_1 = v/3

m_1v = \frac{m_1v}{3} + \frac{m_1v_2}{2}

Divide both side by m_1, then multiply by 6 we have

6v = 2v + 3v_2

3v_2 = 4v

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So the final speed of the second car is 4/3 of the first car original speed

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A speed skater moving across frictionless ice at 9.2 m/s hits a 5.0 m wide patch of rough ice. She slows steadily, then continue
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Answer:

a = -5.10 m/s^2

her acceleration on the rough ice is -5.10 m/s^2

Explanation:

The distance travelled on the rough ice is equal to the width of the rough ice.

distance d = 5.0 m

Initial speed u = 9.2 m/s

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The time taken to move through the rough ice can be calculated using the equation of motion;

d = 0.5(u+v)t

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Substituting the given values;

t = 2(5)/(9.2+5.8)

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The acceleration is the change in velocity per unit time;

acceleration a = ∆v/t

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Substituting the values;

a = (5.8-9.2)/0.66667

a = -5.099974500127

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her acceleration on the rough ice is -5.10 m/s^2

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Answer:

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