|

Mechanics

Cool goIITian

 Joined: 21 Mar 2012 Post: 37
15 Apr 2012 17:10:10 IST
3 People liked this
20
656
RECTILINEAR MOTION
Engineering Entrance , Medical Entrance , NEET , JEE Main , AIIMS , JEE Main & Advanced , Physics , Mechanics , Kinematics , NewtonsLawsCirMotion , Work Power EnergyÂ collisions , Rotation , Gravitation , Simple Harmonic Motion , Fluid Mechanics , Materials Wave Sound , Super Position , units dimensions , com momentum , shm , wave sound

A lift is descending with uniform acceration.To measure the acceleration,a person in the lift drops a coin at the moment lift starts.The coin is 6 ft above the floor of the lift at time it is dropped.The person observes that the coin strikes the floor in 1 second.Calculate the acceleration of lift.

• 1
• 2
• GO
• Go to Page...

New kid on the Block

Joined: 15 Apr 2012
Posts: 18
15 Apr 2012 17:55:46 IST
0 people liked this

this one is too easy u better clear ur fundamentals b4 posting on forum blindly...............2 ft /sec2 upwards

Cool goIITian

Joined: 21 Mar 2012
Posts: 37
15 Apr 2012 17:59:58 IST
0 people liked this

its not 2ft/s2

New kid on the Block

Joined: 15 Apr 2012
Posts: 18
15 Apr 2012 18:01:30 IST
0 people liked this

OHHHHHH COMMON ..........DO U STUDY FROM SOME LOW LEVEL BOOK THAT HAS WRONG ANSWERS

Cool goIITian

Joined: 21 Mar 2012
Posts: 37
15 Apr 2012 18:03:56 IST
0 people liked this

its from H C VERMA

Cool goIITian

Joined: 1 Apr 2012
Posts: 73
15 Apr 2012 18:23:41 IST
0 people liked this

8m/s downward

Blazing goIITian

Joined: 21 Mar 2012
Posts: 1457
15 Apr 2012 18:29:09 IST
0 people liked this

Blazing goIITian

Joined: 21 Mar 2012
Posts: 1457
15 Apr 2012 18:37:03 IST
0 people liked this

No its 20 ft/s2

Blazing goIITian

Joined: 21 Mar 2012
Posts: 1457
15 Apr 2012 18:49:40 IST
0 people liked this

No my final is 20

Cool goIITian

Joined: 21 Mar 2012
Posts: 37
15 Apr 2012 18:50:02 IST
0 people liked this

S.its 20ft/s2.can u please give me the method to solve this

Hot goIITian

Joined: 4 Apr 2012
Posts: 121
15 Apr 2012 18:51:19 IST
0 people liked this

@ashwini .............cant u just shut up............ Tarun is right...........ugave the rong answer only.............at least he tried think about it again and got his mistake and accepted it.........and u wer givin excuses that akshara uses some low level book...............so cheap..............and dont use abusive language as u did in case of sunita banergy............udidnt know the correct reason for cold drink so u answered like that............

Blazing goIITian

Joined: 21 Mar 2012
Posts: 1457
15 Apr 2012 19:03:12 IST
0 people liked this

U have to just know that g=32.34 ft/s2 and net acc.=g-acc. Of lift

Blazing goIITian

Joined: 21 Mar 2012
Posts: 1457
15 Apr 2012 19:03:59 IST
1 people liked this

U have to just know that g=32.34 ft/s2 and net acc.=g-acc. Of lift

Blazing goIITian

Joined: 21 Mar 2012
Posts: 1457
15 Apr 2012 19:04:37 IST
1 people liked this

Hit lyk if u got it

Cool goIITian

Joined: 1 Apr 2012
Posts: 73
15 Apr 2012 19:04:52 IST
1 people liked this

here u can apply the concept of relative velocity , jus take the lift as "a" then the acceleration of coin wrt lift is -g-a , so in other way u can take lift at rest and coin is coming downward with acceleration g+a , and the distance between lift and the coin is 6ft as given, the time taken by coin to reach the floor is 1sec, and initial velocity of coin i.e u=0 , so just apply s=ut +1/2(atsquare).where a is -a-g, t is 1sec and s is -6 ft. i hope it will help.

Cool goIITian

Joined: 1 Apr 2012
Posts: 73
15 Apr 2012 19:06:54 IST
0 people liked this

here take the acceleration of lift as "a" as i mentioned in first line.

Cool goIITian

Joined: 21 Mar 2012
Posts: 37
15 Apr 2012 19:27:47 IST
0 people liked this

thnx tarun n harsh.i got it

Cool goIITian

Joined: 1 Apr 2012
Posts: 73
15 Apr 2012 19:50:22 IST
0 people liked this

MY PLEASURE , U CAN ASK ANY TIME, TRY MORE DIFFICULT QUESTIONS ,AND IF U WILL NOT BE ABLE TO SOLVE IT POST IT HERE , WE WILL ALSO TRY

New kid on the Block

Joined: 15 Apr 2012
Posts: 8
15 Apr 2012 19:52:40 IST
0 people liked this

@HARSH..........STOP FLATTERING...EVERYONE KNOWS HOW MUCH KNACK U HV WHEN IT COMES TOO SOLVING QUESTION....

Cool goIITian

Joined: 1 Apr 2012
Posts: 73
15 Apr 2012 19:54:57 IST
0 people liked this

ok , dude , i m nothing ,now be happy , u r very intelligent as compared to me , i agree with u ,now its ok

 Some HTML allowed. Keep your comments above the belt or risk having them deleted. Signup for a avatar to have your pictures show up by your comment If Members see a thread that violates the Posting Rules, bring it to the attention of the Moderator Team

## For Quick Info

Name

Mobile

E-mail

City

Class

Vertical Limit

Top Contributors
All Time This Month Last Week
1. Bipin Dubey
 Altitude - 16545 m Post - 7958
2. Himanshu
 Altitude - 10925 m Post - 3836
3. Hari Shankar
 Altitude - 10050 m Post - 2205
4. edison
 Altitude - 10815 m Post - 7802
5. Sagar Saxena
 Altitude - 8625 m Post - 8064
 Altitude - 6330 m Post - 1979

Physics

Topics

Mathematics

Chemistry

Biology

Institutes

Parents Corner

Board

Fun Zone