Calculate how long it took King Kong to fall straight down from the top of the Empire State Building (380 m high). What was his velocity just before "landing"? [8.81 s; 86.3 m/s]
Calculate how long it took King Kong to fall straight down from the top of the Empire State Building (380 m high). What was his velocity just before "landing"? [8.81 s; 86.3 m/s]
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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please help me do number 2,3 and 4 am having a hard time
![Free-fall Practice Problems
Name
1) A stone is dropped from the top of a cliff. It is seen to hit the ground below after 3.50 s.
How high is the cliff? [60.0 m]
2) Calculate how long it took King Kong to fall straight down from the top of the Empire State
Building (380 m high). What was his velocity just before "landing"? [8.81 s; 86.3 m/s]
3) A car rolls gently (vo = 0) off a vertical cliff. How long does it take to reach a speed of
90 km/hr? [2.6 s]
4) A foul ball is hit straight up into the air with a speed of 25 m/s. (a) How high does it go?
[31.9 m] (b) How long is it in the air, that is, how long does it take to go up and come back
down again? [5.1 s]
5) A ball is thrown vertically downward with a velocity of 15 m/s from the roof of a building
that is 22 m high. How long does it take to hit the ground below? How fast was it going
when in hit? [1.08 s; 25.6 m/s]
6) A ball is thrown vertically upward with a velocity of 15 m/s from the roof of a building that
is 22 m high. How long does it take to hit the ground below? How fast was it going when in
hit? [4.14 s; 25.6 m/s]
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Transcribed Image Text:Free-fall Practice Problems
Name
1) A stone is dropped from the top of a cliff. It is seen to hit the ground below after 3.50 s.
How high is the cliff? [60.0 m]
2) Calculate how long it took King Kong to fall straight down from the top of the Empire State
Building (380 m high). What was his velocity just before "landing"? [8.81 s; 86.3 m/s]
3) A car rolls gently (vo = 0) off a vertical cliff. How long does it take to reach a speed of
90 km/hr? [2.6 s]
4) A foul ball is hit straight up into the air with a speed of 25 m/s. (a) How high does it go?
[31.9 m] (b) How long is it in the air, that is, how long does it take to go up and come back
down again? [5.1 s]
5) A ball is thrown vertically downward with a velocity of 15 m/s from the roof of a building
that is 22 m high. How long does it take to hit the ground below? How fast was it going
when in hit? [1.08 s; 25.6 m/s]
6) A ball is thrown vertically upward with a velocity of 15 m/s from the roof of a building that
is 22 m high. How long does it take to hit the ground below? How fast was it going when in
hit? [4.14 s; 25.6 m/s]
ype here to search
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