Answer:
Energy can change form, but the total amount of energy stays the same.
<h3>Answer:</h3>
AC ∈ {4, 5, 6, 7}
<h3>Explanation:</h3>
When two sides of a triangle are specified, the allowable values for the length of the third side are between the sum and difference of the given sides.
In ∆ACD, sides DA and CD are both given as length 4. Thus the possible range of values for side AC is 0 – 8. The extremes of this range result in ∆ACD having zero area, so we assume they are not of interest.
In ∆ACB, sides AB and BC are given as having lengths 3 and 6. Thus the possible range of values for side AC is 3 – 9. The extremes of this range result in ∆ACB having zero area, so we assume they are not of interest.
The integers that are in both ranges and that give triangles with non-zero area are ...
... AC ∈ {4, 5, 6, 7}
From the computation, the magnitude of the drag force when the skydiver reached terminal speed is 784 Newtons.
<h3>How to calculate the magnitude</h3>
From the complete information, the skydiver has a mass of 80kg and jumps off a plane. The free-fall acceleration is also given as 9.80m/s².
Therefore, the weight of the skydiver will be:
W = mass × acceleration
W = 80 × 9.80
W = 784N
In conclusion, the magnitude of the drag force due to air resistance is 784N.
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