Why is it important for engineers to consider both short and long term implications of their work?
1 answer:
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Answer:
25.46 MJ
Explanation:
continuity : m3 - m1 = -m<em>e</em>
<em>Energy Equation: m3u3 - m1u1 = -meue + 1Q3</em>
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<em>See the image attached (Well typed out format)</em>
Answer:
The car has an energy of 1.017 × 10⁵ J when it moves at 97 miles per hour
Explanation:
Given the data in the question;
Initial velocity v₁ = 68 miles per hour = 30.398 meter per seconds
let mass of the car be m
kinetic energy of that car is 5 × 10⁵ J
so
E₁ = mv²
we substitute
5 × 10⁵ = × m × ( 30.398 )²
5 × 10⁵ = × m × ( 30.398 )²
5 × 10⁵ = m × 462.019
m = 5 × 10⁵ / 462.019
m = 1082.2065 kg
Now, Also given that; v₂ = 97 miles per hour = 43.362 meter per seconds
E₂ = mv₂²
we substitute
E₂ = × 1082.2065 × ( 43.362 )²
E₂ = × 1082.2065 × 1880.263
E₂ = 1.017 × 10⁵ J
Therefore, The car has an energy of 1.017 × 10⁵ J when it moves at 97 miles per hour