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? a. The distance the rock travels in the first 5 s of its descent in the water b. The acceleration of the rock 2 s before it reaches the lake bottom c. The change in potential energy of the rock-Earth-water system during the final 3 s of the rock's descent. d. The speed of the rock as it enters the lake
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? a. The distance the rock travels in the first 5 s of its descent in the water b. The acceleration of the rock 2 s before it reaches the lake bottom c. The change in potential energy of the rock-Earth-water system during the final 3 s of the rock's descent. d. The speed of the rock as it enters the lake
College Physics
1st Edition
ISBN:9781938168000
Author:Paul Peter Urone, Roger Hinrichs
Publisher:Paul Peter Urone, Roger Hinrichs
Chapter2: Kinematics
Section: Chapter Questions
Problem 36PE: An express train passes through a station. It enters with an initial velocity of 22.0 m/s and...
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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?
a. The distance the rock travels in the first 5 s of its descent in the water
b. The acceleration of the rock 2 s before it reaches the lake bottom
c. The change in potential energy of the rock-Earth-water system during the final 3 s of the rock's descent.
d. The speed of the rock as it enters the lake
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