A 0.2 kg rock is dropped into a lake from a few meters above the surface of the water. The rock reaches terminal velocity in the lake after 5 s in the water. During the final 3 s of its descent to the lake bottom, the rock moves at a constant speed of 4 m/s. Which of the following can be determined from the information given? Select TWO answers. a. The change in potential energy of the rock-Earth-water system during the final 3 s of the rock's descent. b. The distance the rock travels in the first * 5 s of its descent in the water c. The speed of the rock as it enters the lake d. The acceleration of the rock 2 s before it reaches the lake bottom

A 0.2 kg rock is dropped into a lake from a few meters above the surface of the water. The rock reaches terminal velocity in the lake after 5 s in the water. During the final 3 s of its descent to the lake bottom, the rock moves at a constant speed of 4 m/s. Which of the following can be determined from the information given? Select TWO answers. a. The change in potential energy of the rock-Earth-water system during the final 3 s of the rock's descent. b. The distance the rock travels in the first * 5 s of its descent in the water c. The speed of the rock as it enters the lake d. The acceleration of the rock 2 s before it reaches the lake bottom

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Question

Why is d also correct?

A 0.2 kg rock is dropped into a lake from a few
meters above the surface of the water. The rock
reaches terminal velocity in the lake after 5 s in the
water. During the final 3 s of its descent to the
lake bottom, the rock moves at a constant speed
of 4 m/s. Which of the following can be
determined from the information given? Select
TWO answers.
a. The change in potential energy of the
rock-Earth-water system during the final
3 s of the rock's descent.
b. The distance the rock travels in the first *
5 s of its descent in the water
c. The speed of the rock as it enters the lake
d. The acceleration of the rock 2 s before it
reaches the lake bottom

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