Answered: A person jumps from the roof of a house…

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)...

See similar textbooks

Related questions

Concept explainers

Question

A person jumps from the roof of a house 3.7-m high. When he strikes the ground below, he bends his knees so that his torso decelerates over an approximate distance of 0.70 m. If the mass of his torso (excluding legs) is 46 kg .

Find his velocity just before his feet strike the ground.

Express your answer using two significant figures. Enter positive value if the velocity is upward and negative value if the velocity is downward.

v= _________ units

Find the average force exerted on his torso by his legs during deceleration.

Express your answer using two significant figures. Enter positive value if the force is upward and negative value if the force is downward.

FTL= ________ units

Expert Solution

Step 1

Height of house h = 3.7 m

Mass of the torso m = 46 Kg

Distance s = 0.70 m

Initial velocity of person u = 0 m/s

By third equation of motion we get the velocity just before his feet strike the ground

$v^{2} = u^{2} + 2 gh v^{2} = 0^{2} + 2 \times 9.81 \times 3.7 v^{2} = 72.594 v = \sqrt{72.594} v = 8.5 m / s$

Therefore his velocity just before his feet strike the ground is 8.5 m.

Trending now

This is a popular solution!

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.

Similar questions