A kestrel dives from a stationary hover, 20 m above the ground, to catch its prey,...

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Physics

A kestrel dives from a stationary hover, 20 m above the ground,to catch its prey, typically mice, on the ground. (a) If thekestrelâ€™s acceleration toward the ground is due solely to freefall, calculate how long it takes to reach the ground. (3 points)(b) A field mouse can run at a top speed of 10 km/h, which itachieves starting from rest in 1 s. Assuming that the only way forthe mouse to survive the kestrels attack is to find shelter,calculate the maximum distance the mouse can be from shelter tosurvive if it sees the kestrel as it begins its dive. (3 points)The mouse, in fact, only first sees the kestrel when it is at themid point of the dive 10m above the ground. (c) Based only on yourintuition (and not on any calculation), estimate how far the mouseneeds to be from shelter to survive now. (1 point) (d) Calculatehow far the mouse needs to be from shelter to survive in the newsituation.

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4.2 Ratings (620 Votes)

a Initial velocity u 0 Distance travelled h 20 m Using the formula h ut 12 gt2 20 0 05 x 981 x t2 t SQRT204905 202 s b 10 kmhr 278 ms Time taken by See Answer

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