what causes you to get warm if you stand bear a fire ? A . Transmission B . Radiation C . Convection D . Conduction
2 answers:
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Answer:
The distance the lighter fragments slides is 343 m
Explanation:
Here, we have
Let the mass of the heavier fragments be m₁
Let the distance the heavy object slide be d₁
Let the mass of the lighter fragments be m₂
Let the final velocity of the heavier fragments be v₁
Let the final velocity of the lighter fragments be v₂
Let the distance the light object slide be d₂
The distance traveled by the heavy fragment = 7.00 m
Therefore since m₁ = 7 × m₂ we have
Initial total momentum = final total momentum
Since the initial total momentum = 0 we have
m₁·v₁ + m₂·v₂ = 0 or
7·m₂·v₁ = -m₂·v₂
∴ v₂ = 7·v₁
The net work done by the heavier block is
W = μk × m₁ × g × d₁ = 1/2×m₂×v₂²
Also v₁² = 2μk·g·d₁ and
v₂² = 2μk·g·d₂ so that since v₂ = 7·v₁ or v₁ = v₂/7 we get
(v₂/7)² = 2μk·g·d₁
So v₂²/49 = 2μk·g·d₁
or (2μk·g·d₂)/49 = 2μk·g·d₁
∴ d₂/49 = d₁
d₂ = d₁×49 = 7 × 49 = 343 m
The distance the lighter fragments slides = 343 m.