A community for students. Sign up today!
Here's the question you clicked on:
 0 viewing
 3 years ago
I am a little confused on how to solve this, could someone help me out? A cement block accidentally falls from rest from the ledge of a 73.2mhigh building. When the block is 17.0 m above the ground, a man, 1.70 m tall, looks up and notices that the block is directly above him. How much time, at most, does the man have to get out of the way?
 3 years ago
I am a little confused on how to solve this, could someone help me out? A cement block accidentally falls from rest from the ledge of a 73.2mhigh building. When the block is 17.0 m above the ground, a man, 1.70 m tall, looks up and notices that the block is directly above him. How much time, at most, does the man have to get out of the way?

This Question is Closed

Annand
 3 years ago
Best ResponseYou've already chosen the best response.0Here initial vel, u=0 as it falls from rest accl, a=g=9.8 So \[S=u*t+0.5*a*t^2\] becomes \[S=0.5*9.8*t^2\]

Annand
 3 years ago
Best ResponseYou've already chosen the best response.0Time to reach 17m, t1: Here displacement, S=1773.2 t=t1 Substitute in the above eqn and find t1...

Annand
 3 years ago
Best ResponseYou've already chosen the best response.0Time to reach 1.7m, t2: S=1.773.2 ; t=t2 find t2....

Annand
 3 years ago
Best ResponseYou've already chosen the best response.0Time of travel from 17m to 1.7 m= t2t1 He must evade before this time to save himself...
Ask your own question
Ask a QuestionFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.