ASK

Get the Mobile App

Home > categories > Construction & Real Estate > Star Scaffolding > A brick falls freely from a scaffold of 78 m. How long does the brick fall before it strikes the ground? ?

Question:

A brick falls freely from a scaffold of 78 m. How long does the brick fall before it strikes the ground? ?

My Physics homework i need help on.

Answer:

use dist = 1/2 g t ^2 or t = Sqrt[2 d/g] = Sqrt[2 x 78m/9.8m/s/s] = 4s

Share to:

Hot Question

How to judge whether the joint of steel structure is rigid or hinged, as shown below, the steel beam and steel column are all channel steel and welded through weld joint.
8 channel steel and 40*60 square steel tube, which is good in bending strength?
Use two long five meters of 10# channel steel load-bearing frame, the maximum load is?
Larry Midas in seeking to inform how to model such as: steel, double steel, double channel
The following steel is not section bar, is it? A. thread steel, B. steel pipe, C. track, D. channel steel
Can the bypass of the overhanging layer on the site be made of channel steel? How can I put the channel steel, if possible?
Channel structure, angle steel, I-beam and so on, if not painted, the impact on life?
Installation of floor type distribution box, foundation channel production and installation, the quota should choose which two?
Excuse me, when the high voltage cabinet is installed, should the base channel (10#) be placed upright or upside down? Are there any rules?
Cautions for surface zinc spraying on channel steel

Copyright Notice © 2010-2023　www.OKorder.com All rights reserved.