The radius of the circular motion at the given speed is 1.56 m.
The given parameters;
- <em>speed of the rock, v = 2.5 m/s</em>
- <em>acceleration of the rock, a = 4 m/s²</em>
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The radius of the circular motion is calculated by using centripetal acceleration formula as follows;

Thus, the radius of the circular motion at the given speed is 1.56 m.
Learn more about centripetal acceleration here: brainly.com/question/79801
Explanation:

power = Force × distance /time
power = 944N × 12.4m/36secs
power = (944×12.4/36)Nms—¹
power = 390.2Nms—¹ or 390.2Watts or 390.2Js—¹
2) Newton's third law<span>: For every action, there is an equal and opposite reaction.
3) Please provide the diagram </span>
The correct option is (A) 2.5 m/s
Explanation:
Since,
v = fλ ---- (1)
where v = speed of the wave
f = frequency of the wave = 5 Hz
λ = wavelength of the wave = 0.5
Plug in the value in (1):
(1) => v = 5 * 0.5
v = 2.5 m/s
To solve this problem we will apply the concepts of Pythagoras to find the net path. An easy way is to graph the path to trace the path, which resembles that of a right triangle. The information provided is equivalent to that of the two short sides of the triangle, so we will find the longest side by the Pythagorean theorem. In this way,


Therefore the magnitude of the hummingbird’s total displacement is 3.12m