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vova2212 [387]
3 years ago
12

What is the minimum force required to increase the energy of a car by 69 J over a distance of 42 m? Assume the force is constant

.
Group of answer choices

0.61 N

69 N

2900 N

1.6 N

110 N
Physics
1 answer:
sineoko [7]3 years ago
3 0
ANSWER: 1.6N (forth option)



EXPLANATION:
E= Force x displacement
69=F(42)
69/42 = F
F=1.64 N

Answer : 1.6N
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Explanation:

Formula to determine the critical crack is as follows.

          K_{IC} = \gamma \sigma_{f} \sqrt{\pi \times a}

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and,   \sigma_{f} = 570 \times \frac{3}{4}

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Hence, we will calculate the critical crack length as follows.

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Therefore, largest size is as follows.

            Largest size = 2a

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