Home » Ask & Discuss » Physics. » Mechanics « Back to Discussion

Mechanics

Scorching goIITian

Joined:	8 Nov 2008
Post:	247

10 Jul 2009 16:41:26 IST

0 People liked this

286

ncert doubt

Kinematics , NewtonsLawsCirMotion , Work Power Energy collisions , Rotation , Gravitation , Simple Harmonic Motion , Fluid Mechanics , Materials Wave Sound , Super Position , units dimensions , com momentum , shm , wave sound

A trolley of mass 200kg moves with a uniform speed of 36km/h on a frictionless track.A child of mass 20kg runs on the trolley from one end to the other ,10m away,with a speed of 4 m/s relative to the trolley in a direction opposite to its motion,and jumps out of the trolley.What is the final speed of the trolley?How much has the trolley moved from the time the child begins to run??

Share this article on:

Comments (1)

BALGANESH

Blazing goIITian

Joined: 21 Dec 2007

Posts: 1025

11 Jul 2009 13:59:44 IST

Like 0 people liked this

well relative speed = 4m/srelative distance=10mtiem taken by the boy to move from one side of trolley to the other =distance/speed = 10/4 = 2.5s initial speed of trolley=36km/h=10m/s time taken = 2.5 sdistance moved by the trolley = 2.5*10= 25 m

Quick Reply

Reply

	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