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Velocity If a rock is dropped from a 144-ft building, its
Chapter 4, Problem 72A(choose chapter or problem)
Problem 72A
Velocity If a rock is dropped from a 144-ft building, its position (in feet above the ground) is given by s(t) = −16t2 + 144, where t is the time in seconds since it was dropped.
a. What is its velocity 1 second after being dropped? 2 seconds after being dropped?
b. When will it hit the ground?
c. What is its velocity upon impact?
Questions & Answers
QUESTION:
Problem 72A
Velocity If a rock is dropped from a 144-ft building, its position (in feet above the ground) is given by s(t) = −16t2 + 144, where t is the time in seconds since it was dropped.
a. What is its velocity 1 second after being dropped? 2 seconds after being dropped?
b. When will it hit the ground?
c. What is its velocity upon impact?
ANSWER:
Solution:
Step 1 of 2:
In this problem, we need to find the velocity 1 second after being dropped and 2 seconds after being dropped.