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Sonja [21]
2 years ago
7

Two objects with masses m and 3m are connected by a compressed spring so that the energy stored in the spring is 375 joules. If

we release the spring, when the spring returns to its normal length, how many joules is the kinetic energy of the lighter body?
Physics
1 answer:
cluponka [151]2 years ago
7 0

Answer:

281.25 J

Explanation:

We are told that the two objects with masses m and 3m.

Also that energy stored in the spring is 375 joules.

Now, initially the centre of mass of the system took place at rest, it means v1 = v and v2 = v/3

Thus, from principle of conservation of energy, we have;

½mv² + ½(3m)(v/3)² = 375J

(m + 3m/9)½v² = 375

(4/3)m × ½v² = 375

Multiply both sides by ¾ to get;

½mv² = 375 × ¾

½mv² = 281.25 J

Therefore, energy of lighter body is 281.25 J

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When monochromatic light passes through the interface between two unknown materials at an angle θ where 0∘<θ<90∘, no chang
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Answer:

the correct one is the first,   the refractive index of the two materials must be the same

Explanation:

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In this case, it indicates that the light does not change direction, so the input and output angle of the interface must be the same,

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substituting

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When reviewing the answers, the correct one is the first

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How do metal detcors operate
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5 0
2 years ago
The pressure exerted by a gas is 2.0 atm while it has a volume of 350 mL. What would be the volume of this sample of gas at stan
PSYCHO15rus [73]

Answer:

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to find out

volume

solution

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here P1 = 2 and V1 = 0.350 and P2 = 1 for standard atmospheric pressure

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8 0
2 years ago
On a roller coaster ride at an amusement park, a car travels from 7.6 m/s to 56 m/s in 3 seconds. whats the cars acceleration?
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Acceleration is defined as rate of change in velocity

So we can write its formula as

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

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3 0
3 years ago
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